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1.
A force 
acts on a body in the 
-direction. The work done by this force during a displacement from 
to 
is
acts on a body in the -direction. The work done by this force during a displacement from to is
2.
A 10 kg object collides with stationary 5 kg object and after collision they stick together and move forward with velocity 4 
.what is the velocity with which the 10 kg object hit the second one?
.what is the velocity with which the 10 kg object hit the second one?
3.
A particle is projected at 
to the horizontal with a kinetic energy
. The kinetic energy at the highest point is
to the horizontal with a kinetic energy. The kinetic energy at the highest point is
4.
A rope ladder with a length 
carrying a man with a mass 
at its end is attached to the basket of balloon with a mass 
. The entire system is in equilibrium in the air. As the man climbs up the ladder into the balloon, the balloon descends b y a height 
. Then the potential energy of the man
carrying a man with a mass at its end is attached to the basket of balloon with a mass . The entire system is in equilibrium in the air. As the man climbs up the ladder into the balloon, the balloon descends b y a height . Then the potential energy of the man
5.
A ball is released from certain height. It loses 50% of its kinetic energy on striking the ground. It will attain a height again equal to
6.
Which of the following statements is wrong?
7.
Which of the following graphs show variation of potential energy (U) with position x.
8.
A ball dropped from a height of 
rebounds to a height of 
after hitting the ground. Then the percentage of energy lost is
rebounds to a height of after hitting the ground. Then the percentage of energy lost is
9.
Two particles having position vectors 
and 
are moving with velocities 
and 
. If they collide after 2 seconds, the value of '
' is
and are moving with velocities and . If they collide after 2 seconds, the value of '' is
10.
A body of mass 10 kg is moving on a horizontal surface by applying a force of 10 N in forward direction. If body moves with constant velocity, the work done by force of fiction for a displacement of 2m is