A 180 metre long train is moving due north at a speed of 25 m/s. A small bird is flying due south, a little above the train, with a speed of 5 m/s. The time taken by the bird to cross the train is

1.10 s

2.12 s

3.9 s

4.6 s

**Posted Date**:-2021-12-21 17:54:06

A block of mass 2 kg rests on a rough inclined plane making an angle of 30 degree with the horizontal. The coefficient of static friction between he block and the plane is 0.7. The frictional force on the block is

1.9.8 N

2.0.7 Ã— 9.8 Ã— âˆš3 N

3.9.8 Ã— âˆš3 N

4.0.7 Ã— 9.8 N

**Posted Date**:-2021-12-22 10:16:21

A block of wood is placed on a surface. A force is applied parallel to the surface to move the body. The frictional force developed acts

1.normal to the surface upwards

2.normal to the surface downwards

3. along the direction of the applied force

4.opposite to the direction of the applied force

**Posted Date**:-2021-12-22 10:11:59

A body is moving along a circle with an increasing speed. It possesses?

1. centripetal acceleration only (ac)

2. tangential acceleration only (ar)

3.both tangential and centripetal acceleration (ar and ac)

4.No acceleration

**Posted Date**:-2021-12-22 10:04:05

A body is sliding down a rough inclined plane which makes an angle of 30 degree with the horizontal. If the coeffcient of friction is 0.26, the acceleration in m/sÂ² is

1.1.95

2. 2.78

3.3.47

4.4.6

**Posted Date**:-2021-12-22 10:14:19

A body is traveling in a circle at constant speed. It

1.has an inward acceleration

2.has constant velocity.

3.has no acceleration

4.has an outward radial acceleration

**Posted Date**:-2021-12-22 09:50:43

A body makes a displacement of 4 m due East from a point O and then makes displacement of 3 m due North. Its resultant displacement from O

1. 7 m

2. 1 m

3.5 m

4. 1 . 2 m

**Posted Date**:-2021-12-22 09:49:56

A body of mass 5 kg is travelling with a uniform velocity of 2 m/s. Its momentum is

1.10 kg m/s

2.7 kg m/s

3.2 .5 kg m/s

4.3 kg m/s

**Posted Date**:-2021-12-22 10:10:27

A body starts from rest and travels for five seconds to make a displacement of 25 m if it has travelled the distance with uniform acceleration a then a is

1. 3 m/sÂ²

2.4 m/sÂ²

3.2 m/sÂ²

4.1 m/sÂ²

**Posted Date**:-2021-12-21 18:08:28

A body starts from rest and travels for t second with uniform acceleration of 2 m/sÂ². If the displacement made by it is 16 m, the time of travel t is

1.4 s

2.3 s

3.6 s

4.8 s

**Posted Date**:-2021-12-21 17:58:26

A body starts from rest and travels with an acceleration of 2 m/sÂ². After t seconds its velocity is 10 m/s . Then t is

1.10 s

2.5 s

3.20 s

4. 6 s

**Posted Date**:-2021-12-21 18:02:15

A body starts from rest and travels with an acceleration of 2 m/sÂ². After t seconds its velocity is 10 m/s. Then t is

1.10 s

2. 5 s

3.20 s

4. 6 s

**Posted Date**:-2021-12-21 18:06:11

A body starts from rest and travels with uniform acceleration a to make a displacement of 6 m. If its velocity after making the displacement is 6 m/s, then its uniform acceleration a is

1.6 m/sÂ²

2.2 m/sÂ²

3.3 m/sÂ²

4.4 m/sÂ²

**Posted Date**:-2021-12-21 18:11:20

A body starts from rest and travels with uniform acceleration of 2 m/sÂ². If its velocity is v after making a displacement of 9 m, then v is

1.8 m/s

2.6 m/s

3.10 m/s

4.4 m/s

**Posted Date**:-2021-12-21 18:05:31

A body starts from rest and travels with uniform acceleration on a straight line. If its velocity after making a displacement of 32 m is 8 m/s, its acceleration is

1. 1 m/sÂ²

2.2 m/sÂ²

3.3 m/sÂ²

4.4 m/sÂ²

**Posted Date**:-2021-12-21 17:56:15

A body starts from rest. If it travels with an acceleration of 2 m/sÂ², its displacement at the end of 3 seconds is

1.9 m

2.12 m

3.16 m

4.10 m

**Posted Date**:-2021-12-21 18:04:25

A body travels along the circumference of a circle of radius 2 m with a linear velocity of 6 m/s . Then its angular velocity is

1.6 rad /s

2.3 rad /s

3.2 rad / s

4.4 rad / s

**Posted Date**:-2021-12-22 09:59:23

A boy moves on a circular distance of radius R. Starting from a point A he moves to a point B which is on the other end of the diameter AB. The ratio of the distance travelled to the displacement made by him is

1. âˆ/2

2.âˆ

3.2âˆ

4. 4âˆ

**Posted Date**:-2021-12-21 18:09:11

A boy starts from a point A, travels to a point B at a distance of 1.5 km and returns to A. If he takes one hour to do so, his average velocity is

1.3 km/h

2.zero

3.1.5 km/h

4. 2 km/h

**Posted Date**:-2021-12-21 17:54:50

A boy starts from a point A, travels to a point B at a distance of 3 km from A and returns to A. If he takes two hours to do so, his speed is

1.3 km/h

2.zero

3.2 km/h

4.1.5 km/h

**Posted Date**:-2021-12-21 17:53:21

A bullet of mass 25 g moving with a velocity of 200 cm/s is stopped within 5 cm of the target. The average resistance offered by the target is

1.1 N

2.2 N

3.3 N

4.4 N

**Posted Date**:-2021-12-22 10:12:36

A can filled with water is revolved in a vertical circle of radius 4 metre and the water does not fall down. The time period of revolution will be

1.4 sec

2.10 sec

3.8 sec

4.1 sec

**Posted Date**:-2021-12-22 09:53:29

A car is moving with a speed of 30 m/s on a circular path of radius 500 m. Its speed is increasing at the rate of 2 m/sÂ². The acceleration of the car is

1.2 m/sÂ²

2.9.8 m/s Â²

3.1.8 m/2

4.2.7 m/sÂ²

**Posted Date**:-2021-12-22 10:01:59

A car sometimes overturns while taking a turn. When it overturns, it is

1.the inner wheel which leaves the ground first

2.either inner wheel or the outer wheel leaves the ground

3.both the wheel leave the ground simultaneously

4.the outer wheel which leaves the ground first

**Posted Date**:-2021-12-22 09:58:25

A coin kept on a rotating gramophone disc just begins to slip if its centre is at a distance of 8 cm from the centre of the disc. The angular velocity of the gramophone disc is then doubled. Through what distance, the coin should be shifted towards the centre, so that the coin will just slip?

1.2 cm

2.6 cm

3.16 cm

4.4 cm

**Posted Date**:-2021-12-22 09:52:40

A cyclist goes round a circular path of circumference 343 m in s. The angle made by him, with the vertical is

1.440

2.420

3.430

4.450

**Posted Date**:-2021-12-22 09:49:04

A force F is given by F = at + btÂ², where t is time. What are the dimensions of a and b?

1. MLT-1 and MLT0

2.MLT-3 and ML2T4

3.MLT-4 and MLT1

4. MLT-3 and MLT-4

**Posted Date**:-2021-12-21 17:36:33

A gun of mass 1000 kg fires a projectile of mass 1 kg with a horizontal velocity of 100 m/s. The velocity of recoil of the gun in the horizontal direction is

1.5 m/s

2. 0.1 m/s

3.15 m/s

4.20 m/s

**Posted Date**:-2021-12-22 10:15:17

A machine gun fires a bullet of mass 40 g with a velocity of 1200 ms-1. The man holding it can exert a maximum force on 144 N on the gum. How many bullets can he fire per second at the most?

1.one

2.four

3.two

4.three

**Posted Date**:-2021-12-22 10:07:46

A particle of mass 0.3 kg is subjected to a force F = -kx with k = 15 N/m. What will be its initial acceleration if it is released from a point 20 cm away from the origin?

1.15 m/sÂ²

2.3 m/sÂ²

3.10 m/sÂ²

4. 5 m/sÂ²

**Posted Date**:-2021-12-22 10:17:15

A particle starting from the origin (0, 0) moves in a straight line in the (x, y) plane. Its coordinates at a later time are the path of the particle makes with the x-axis an angle of

1.300

2.450

3.600

4.0

**Posted Date**:-2021-12-21 17:47:05

A passenger in a moving bus is thrown forward when the bus is suddenly stopped. This is explained

1.by Newtons first law

2.by Newtons second law

3.by Newtons third law

4. by the principle of conservation of momentum

**Posted Date**:-2021-12-22 10:08:48

A passenger sitting in a bus moving at uniform speed, feels pushed backward whenever the bus is accelerated forward. This type of force is called

1.Gravitational force

2.real force

3.fictitious force or pseudo force

4.frictional force

**Posted Date**:-2021-12-22 10:09:40

A scientific theory

1.cannot be changed but can be reformulated

2.mong scientisis fixed once and for all because it is logical

3.is changed to suit new fashion ats

4. can be revised if required to fit new phenomenon or data

**Posted Date**:-2021-12-21 17:29:21

A small body attached at the end of an inextensible string completes a vertical circle, then its

1.angular momentum remains constant

2.linear momentum remains constant

3.angular velocity remains constant

4.total mechanical energy remains constant

**Posted Date**:-2021-12-22 09:47:57

A spherical ball of mass 10-6 kg hits a wall 1000 times per second normally with a velocity of 1000 m/s and rebounds with same velocity along the initial direction. The force experienced by the wall is

1.1 N

2.4 N

3.2 N

4. 8 N

**Posted Date**:-2021-12-22 10:06:54

Absolute error of the measurement is

1.the difference between the individual measurement and the true value of the quantity cubed.

2.the difference between the individual measurement and the true value of the quantit y squared.

3.the difference between two individual measurements and their mean

4.the difference between the individual measurement and the true value of the quantity

**Posted Date**:-2021-12-21 17:49:54

Atomic and molecular phenomena are dealt with by

1.Newtonian Mechanics

2.fluid Mechanics

3.applied Mechanics

4.Quantum Mechanics

**Posted Date**:-2021-12-21 17:23:54

Electron volt is a unit of

1.charge

2.potential difference

3.energy

4. magnetic force

**Posted Date**:-2021-12-21 17:43:16

Heliocentric theory proposed by Nicolas Copernicus was

1.replaced by circular orbits to fit the data better

2.replaced by elliptical orbits to fit the data better

3.replaced by elliptical orbits to fit the taste of new rulers of Italy

4. replaced by parabolic orbits to fit the data better

**Posted Date**:-2021-12-21 17:25:44

If force (F), work (W) and velocity (v) are taken as fundamental quantities. What is the dimensional formula of time (T)?

1. [WFv]

2.[WFv-1]

3.[W-1F -1v]

4.[WF-1v -1]

**Posted Date**:-2021-12-21 17:39:09

In a system of units if force (F), acceleration (A) and time (T) are taken as fundamentals units then the dimensional formula of energy is

1.FA2T

2.FAT2

3.FA2T

4.FAT

**Posted Date**:-2021-12-21 17:38:21

In SI system the fundamental units are

1.meter, kilogram, second, ampere, Kelvin, mole and candela

2.meter, kilogram, second, coulomb, Kelvin, mole and candela

3.meter, Newton, second, ampere, Kelvin, mole and candela

4.meter, kilogram, second, ampere, Kelvin, mole and lux

**Posted Date**:-2021-12-21 17:45:19

Inside the nucleus, two protons are held together by a force which overcomes the repulsion. This force is called

1.gravitational force

2. electrostatic force

3.weak force

4.strong force

**Posted Date**:-2021-12-22 10:11:10

Inside the nucleus, two protons are held together by a force which overcomes the repulsion. This force is called

1.gravitational force

2. electrostatic force

3.weak force

4.strong force

**Posted Date**:-2021-12-22 10:11:10

Just as a new experiment may suggest an alternative theoretical model, a theoretical advance may suggest what to look for in some for in some experiments. Which of the following experiments can be considered to support this claim?

1.Davisson and Germer Experiment

2.experimental discovery of positron

3. scattering of alpha particle or the gold foil experiment

4.Michelson Morley experiment

**Posted Date**:-2021-12-21 17:26:42

ML-1T -2 is the dimensional formula of

1.magnetic induction

2.self-inductance

3.electric potential

4.electric field

**Posted Date**:-2021-12-21 17:41:23

Newtonian mechanics could not explain

1.fall of bodies on earth

2.Some of the most basic features of atomic phenomena

3. movement of planets

4.flight of rockets

**Posted Date**:-2021-12-21 17:32:24

Newtonian mechanics could not explain

1.fall of bodies on earth

2.Some of the most basic features of atomic phenomena

3. movement of planets

4.flight of rockets

**Posted Date**:-2021-12-21 17:32:24

One radian is defined to be the angle subtended where the arc length S is exactly equal to the?

1.radius of the circle.

2.diameter of the circle.

3.circumference of the circle.

4. half of radius of the circle.

**Posted Date**:-2021-12-22 09:57:26

One radian is equal to?

1.57.7o

2.53.7o

3.59.3o

4.57.3o

**Posted Date**:-2021-12-22 10:03:01

Out of the basic forces , gravitational force

1.ranks first in strength

2.ranks second in strength

3.ranks third in strength

4.ranks fourth in strength

**Posted Date**:-2021-12-22 10:20:08

Physical quantities are

1.quantities such as degrees, radians and steradians

2. quantities such as length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity

3. quantities such as pounds, dollars and rupees

4.quantities such as kilos, pounds and gallons

**Posted Date**:-2021-12-21 17:33:48

Physics is a

1.Applied Science

2.Mathematical Science

3.Engineering Science

4.Natural Science

**Posted Date**:-2021-12-21 17:31:33

The angular velocity depends upon the rate of change of the?

1.Angular acceleration

2.Angular Distance.

3. Angular Displacement

4.torque

**Posted Date**:-2021-12-22 09:46:50

The atmospheric pressure is 106 dyne/cmÂ². What is its value in SI unit?

1.105 newton/mÂ²

2.106 newton/mÂ²

3.104 newton/mÂ²

4.103 newton/mÂ²

**Posted Date**:-2021-12-21 17:37:25

The centripetal component of acceleration arises when?

1.The direction of motion is changed.

2. The direction propagation is changed.

3.The direction of gravity is changed

4.The direction of projectile is changed

**Posted Date**:-2021-12-22 10:00:13

The dimensional formula for acceleration is

1.[LT2]

2.[LT?2]

3.[L2T]

4.[L2T2]

**Posted Date**:-2021-12-21 18:10:12

The dimensional formula for speed is

1.T-1

2.LT-1

3.L-1T-1

4. L-1T

**Posted Date**:-2021-12-21 17:59:45

The dimensional formula for velocity is

1.[LT]

2. [LT-1]

3.[L2T]

4.[L-1T]

**Posted Date**:-2021-12-21 18:01:22

The dimensions of kinetic energy is

1. [M 2L2T]

2.[ML 2T]

3.[ML 2T-2]

4. [ML 2T-1]

**Posted Date**:-2021-12-21 17:35:50

The dimensions of kinetic energy is same as that of

1.force

2.pressure

3.work

4.momentum

**Posted Date**:-2021-12-21 17:39:48

The displacement in metres of a body varies with time t in second as y = t2 â€“ t â€“ 2. The displacement is zero for a positive of t equal to

1.1 s

2. 2 s

3.3 s

4.4 s

**Posted Date**:-2021-12-21 17:52:23

The frame of reference attached to a satellite of the earth is

1.an inertial frame

2. an absolute frame at rest with respect to the stars

3. a non â€“ inertial frame

4.a gravitational frame

**Posted Date**:-2021-12-22 10:20:57

The mass of a body is 2 kg. It weight is

1.19.6 N

2.20 N

3.30 N

4.40 N

**Posted Date**:-2021-12-22 10:13:33

The mass of a body which is equal to the ratio of the force acting on a body to the acceleration produced in the body is

1.the gravitational mass

2.the electromagnetic mass

3.the internal mass

4. the inertial mass

**Posted Date**:-2021-12-22 10:06:03

The path followed by a projectile is called its?

1.Territory

2.Treasury

3.Tractor

4.Trajectory

**Posted Date**:-2021-12-22 09:56:36

The path of a particle is given by the expression y = at + btÂ², where a and b are constants . Y is the displacement at time t. Its velocity at any instant is given by

1. a + 2bt

2.zero

3.2bt

4.at

**Posted Date**:-2021-12-22 10:04:56

The scientific method is

1.a prescribed method for investigating phenomena, acquiring new knowledgeâ€¦

2.A procedure for proposing new hypothesis

3.a body of techniques for investigating phenomena, acquiring new knowledgeâ€¦

4.A method for proposing new theories.

**Posted Date**:-2021-12-21 17:27:52

The total flight requires a time that is?

1.four times the time necessary to reach the maximum height.

2.thrice the time necessary to reach the maximum height

3.equal to the time necessary to reach the maximum height.

4. twice the time necessary to reach the maximum height

**Posted Date**:-2021-12-22 09:55:49

The volume of a cube in mÂ³ is equal to the surface area of the cube in mÂ². The volume of the cube is

1.64 mÂ³

2. 216 mÂ³

3.512 mÂ³

4.196 mÂ³

**Posted Date**:-2021-12-21 17:44:09

The word centripetal is derived from two Greek words meaning?

1.Seeking the situation.

2.Seeking the centre.

3.Touching the centre.

4.Leaving the centre.

**Posted Date**:-2021-12-22 10:01:00

The word Science originates from the Latin verb Scientia meaning

1.to know

2.to see

3.to experience

4. to observe

**Posted Date**:-2021-12-21 17:22:52

Two bodies of masses 4 kg and 5 kg are acted upon by the same force. If the acceleration of lighter body is 2 m/sÂ², the acceleration of heavier body is

1.1 m/sÂ²

2.1.2 m/sÂ²

3. 1.6 m/sÂ²

4.1.8 m/sÂ²

**Posted Date**:-2021-12-22 10:18:07

Wave picture of light failed to explain.

1. the photoelectric effect

2. polarization of light

3. diffraction of light

4.interference of light

**Posted Date**:-2021-12-21 17:24:45

What is the dimensional formula of magnetic field?

1.MT-2A-1

2.MT-1A-2

3.M-1L-2TA-1

4. M-1LTA-2

**Posted Date**:-2021-12-21 17:42:32

When a body P moves on a circular path, the centripetal acceleration is

1.directed inwards from P, to the centre of the circle

2.directed tangential to the circumference of the circle, at P

3.directed perpendicular to the planc of the circle, at P

4.directed outward, perpendicular to the circumference of the circle

**Posted Date**:-2021-12-22 09:51:56

When angular velocity changes with respect to time then?

1.an angular acceleration is produced

2.a linear acceleration is produced

3. it constitute a couple

4.a linear velocity is produced

**Posted Date**:-2021-12-22 09:54:23

Which of the following groups have different dimensions?

1.Potential difference, EMF, voltage

2.Pressure, stress, Youngs modulus

3.Heat, energy, work done

4.Dipole moment, electric flux, electric field

**Posted Date**:-2021-12-21 17:40:41

Which of the following is a possible final step in applying the scientific method

1.Formulating a hypothesis

2.Building a theory

3.Analysis of test results

4. Formulation of a question

**Posted Date**:-2021-12-21 17:30:53

Which of the following is a possible first step in applying the scientific method

1.Conducting tests

2.Formulating a hypothesis

3.Formulation of a question

4.Building a theory

**Posted Date**:-2021-12-21 17:30:08

Which of the following pairs has the same dimensions?

1.specific heat and latent heat

2.lmpulse and momentum

3.surface tension and force

4. moment of lnertia and torque

**Posted Date**:-2021-12-21 17:35:01

Which of the following units denotes the dimensions [ML2/Q2], where Q represents the electric charge?

1.Wb/mÂ²

2.Henry(H)

3.H/mÂ²

4.Weber(Wb)

**Posted Date**:-2021-12-21 17:50:48

Which one of the following is the unit of velocity?

1.kilogram

2.metre

3.m/s

4.second

**Posted Date**:-2021-12-21 17:57:15

Which one of the following represents the correct dimensions of the coefficient of viscosity?

1. [ML-1T-2]

2.[MLT-1]

3.[ML-1T-1]

4. [ML-2T-2]

**Posted Date**:-2021-12-21 17:46:25

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