1. Define the conservative and non conservative forces.
Give examples of each.
2. A light body and a heavy body have same linear
momentum. Which one has greater K.E? (Ans. : lighter body has more K.E.)
3. The momentum of the body is doubled what % does its
K.E change? [Ans : (300%)]
4. A body is moving along a circular path. How much work
is done by the centripetal force?
5. Which spring has greater value of spring constant - a
hard spring or a delicate spring?
6. Two bodies stick together after collision. What type
of collision is in b/w these two bodies?
7. State the two conditions under which a force does no
work?
8. How will the momentum of a body changes if its K.E is
doubled?
9. K.E of a body is increased by 300 %. Find the %
increase in its momentum? (100%)
10. A light and a heavy body have same K.E. which of the
two have more momentum and why? (heavier body)
11. Mountain roads rarely go straight up the slop, but
wind up gradually. Why?
12. A truck and a car moving with the same K.E on a
straight road. Their engines are simultaneously
switched off
which one will stop at a lesser distance?
13. What happens to the P.E of a bubble when it rises in
water? (decrease)
14. A body is moving at constant speed over a friction
surface. What is the
work done by the weight of the body? (W = 0)
15. Is it necessary that work done in the motion of a
body over a closed loop is zero for every force in nature? Why?
16. Define spring constant of a spring?
17. What happens when a sphere collides head on
elastically with a sphere of same mass initially at rest?
