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Class XI Physics Work, Energy and Power 5
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Question 1
If momentum is increased by 20%, then kinetic energy increases by
Question 2
Two persons each of mass m are standing at the two extremes of a railroad car of mass M resting on a smooth track. The person on the left jumps to the left with a velocity u with respect to the ground. Thereafter the second person jumps to right with same velocity u with respect to the ground. Find the velocity of the train when both the persons have jumped off.
Question 3
A bomb of mass 30 kg at rest explodes into two pieces of masses 18kg and 12kg. The velocity of 18kg mass is 6ms–1. The kinetic energy of the other mass is
Question 4
The power supplied by a force acting on a particle moving in a straight line is constant. The velocity of a particle varies with displacement as:
Question 5
Find the total compression in the spring.
Question 6
A particle is moving on circle of radius 5m. A force of constant magnitude 10 N is acting on particle along tangent find work done (in J) by this force when particle will complete one circle.
Question 7
You lift a heavy book from the floor of the room and keep it in the book-shelf having a height 2 m. In this process, you take 5 seconds. The work done by you will depend upon
Question 8
A block of ice mass 10 kg slides down an incline 5 m long and 3 m high. A man pushes up on the ice block parallel to the incline so that it slides down at constant speed. The coefficient of friction between the ice and the incline is 0.1. Find the work done by the man on the block
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Aug 8JEE & BITSAT
