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4

Rate of change of angular momentum is equal to

A. Force

B. Torque

C. Linear momentum

D. Impulse

Correct Answer :

B. Torque


Related Questions

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4

Ball A of mass 250 g moving on a smooth horizontal table with a velocity of 10 m/s hits an identical stationary ball B on the table. If the impact is perfectly elastic, the velocity of the ball B just after impact would be

A. Zero

B. 5 m/sec

C. 10 m/sec

D. None of these

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4

0.For maximum range of a projectile, the angle of projection should be

A. 30°

B. 45°

C. 60°

D. None of these

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4

A cube on a smooth horizontal surface

A. Cannot be in stable equilibrium

B. Cannot be in neutral equilibrium

C. Cannot be in unstable equilibrium

D. Can be in any of these states

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4

Free body diagram is an

A. Isolated joint with only body forces acting on it

B. Isolated joint with internal forces acting on it

C. Isolated joint with all the forces, internal as well as external, acting on it

D. None of the above

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4

A uniform pyramid and a uniform prism of same height lie with their base on the surface. Which is more stable?

A. Pyramid

B. Prism

C. Both equally stable

D. None of the above

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4

Kinetic friction may be defined as

A. Friction force acting when the body is just about to move

B. Friction force acting when the body is in motion

C. Angle between normal reaction and resultant of normal reaction and limiting friction

D. Ratio of limiting friction and normal reaction

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4

The masses of two balls are in the ratio of 2 : 1 and their respective velocities are in the ratio of 1 : 2 but in opposite direction before impact. If the coefficient of restitution is ½, the velocities of separation of the balls will be equal to

A. Original velocity in the same direction

B. Half the original velocity in the same direction

C. Half the original velocity in the opposite direction

D. Original velocity in the opposite direction

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4

In which of the following trusses, the method of substitution is required for determining the forces in all the members of the truss by graphic statics?

A. Howe truss

B. King post truss

C. Fink truss

D. Warren truss

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4

The maximum displacement of a particle executing S.H.M. corresponds to

A. Zero potential energy and maximum kinetic energy

B. Zero kinetic energy and maximum potential energy

C. Maximum kinetic energy and maximum potential energy

D. Minimum kinetic energy and minimum potential energy

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4

P is the force acting on a body whose mass is m and acceleration is f. The equation P - mf= 0, is known as

A. Equation of dynamics

B. Equation of dynamic equilibrium

C. Equation of statics

D. None of these

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4

Two balls of masses 3 kg and 6 kg are moving with velocities of 4 m/sec and 1 m/sec respectively, towards each other along the line of their centers. After impact the 3 kg ball comes to rest. This can happen only if the coefficient of restitution between the balls is

A. 2/3

B. 1/5

C. 3/5

D. 1/3

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4

A ball of mass 1 kg moving with a velocity of 2 m/sec collides a stationary ball of mass 2 kg and comes to rest after impact. The velocity of the second ball after impact will be

A. Zero

B. 0.5 m/sec

C. 1.0 m/sec

D. 2.0 m/sec

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4

The forces which meet at one point and have their lines of action in different planes are called

A. Coplanar non-concurrent forces

B. Non-coplanar concurrent forces

C. Non-coplanar non-current forces

D. Intersecting forces

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4

Minimum potential energy of a system will be in the position of

A. Stable equilibrium

B. Unstable equilibrium

C. Neutral equilibrium

D. All of the above

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4

The velocity ratio of an inclined plane of inclination θ with horizontal for lifting a load is

A. sin θ

B. cos θ

C. tan θ

D. cosec θ

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4

When two forces, each equal to P, act at 90° to each other, then the resultant will be

A. P

B. P√2

C. P/√2

D. 2P

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4

The phenomenon of collision of two elastic bodies takes place because bodies

A. Immediately after collision come momentarily to rest

B. Tend to compress each other till they are compressed maximum possible

C. Attempt to regain its original shape due to their elasticities

D. All the above

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4

The member which does not carry zero force in the structure shown in below figure, is

A. ED

B. DC

C. BC

D. BD

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4

Williot-Mohr diagram is used to determine deflection in

A. Trusses only

B. Beam only

C. Rigid frames only

D. Any type of structure

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4

A particle executes a simple harmonic motion. While passing through the mean position, the particle possesses

A. Maximum kinetic energy and minimum potential energy

B. Maximum kinetic energy and maximum potential energy

C. Minimum kinetic energy and maximum potential energy

D. Minimum kinetic, energy and minimum potential energy

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4

The unit of impulse, is

A. kg.m/sec

B. kg.m/sec

C. kg.m/sec2

D. kg.m/sec

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4

Periodic time of a particle moving with simple harmonic motion is the time taken by the particle for

A. Half oscillation

B. Quarter oscillation

C. Complete oscillation

D. None of these

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4

If the resultant of two forces has the same magnitude as either of the force, then the angle between the two forces is

A. 30°

B. 45°

C. 60°

D. 120°

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4

A satellite moves in its orbit around the earth due to

A. Gravitational force

B. Centripetal force

C. Centrifugal force

D. None of these

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4

The member forces in a statically in determinate truss

A. Can be obtained by graphic statics

B. Cannot be obtained by graphic statics

C. May be obtained by graphic statics

D. Can be obtained by graphic statics by trial and error

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4

For perfectly elastic bodies, the value of coefficient of restitution is

A. Zero

B. 0.5

C. 1.0

D. Between 0 and 1

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4

The acceleration of a train starting from rest at any instant is 1/6(V + 1) m/sec² where V is the velocity of the train in m/sec. The train will attain a velocity of 36 km/hour after travelling a distance of

A. 2000 m

B. 2100 m

C. 2200 m

D. 2300 m

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4

One Joule is equivalent to

A. 9.81 Newton metre

B. 1 Newton metre

C. 1 kg wt metre

D. 1 dyne metre

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4

If a body is acted upon by a number of coplanar non-concurrent forces, it may

A. Rotate about itself without moving

B. Move in any one direction

C. Move in any one direction rotating about itself

D. All the above

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4

Work may be defined as

A. Force × distance

B. Force × velocity

C. Force × acceleration

D. None of these