## Rate of change of angular momentum is equal to_______________?

A. force
B. torque
C. linear momentum
D. impulse

A. energy
B. momentum
C. torque
D. impulse

## In a simple harmonic motion, the position of equilibrium is always_________________?

A. stable
B. unstable
C. neutral
D. none of the above

A. zero
B. maximum
C. minimum
D. varying

## Two objects moving with uniform speeds are 5 m apart after 1 second when they move towards each other and are 1 m apart when they move in the same direction. The speeds of the objects are____________________?

A. 2 m/sec and 2 m/sec
B. 3 m/sec and 2 m/sec
C. 3 m/sec and 3 m/sec
D. 4 m/sec and 6 m/sec

## A heavy ladder resting on floor and against a vertical wall may not be in equilibrium if________________?

A. floor is smooth and wall is rough
B. floor is rough and wall is rough
C. both floor and wall are rough
D. both floor and wall are smooth

## The potential energy of a particle falling through a straight shaft drilled through the earth (assumed homogenous and spherical) is proportional to____________________?

A. log r
B. r
C. r2
D. 1/r

where r is the distance of’the particle from centre of the earth

A. constant
B. zero
C. maximum
D. minimum

A. 20 m/sec
B. 30 m/sec
C. 40 m/sec
D. 50 m/sec

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