Question

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Answer the following questions:
State the meaning of recoil velocity of a gun
Name the unbalanced force which slow down a moving bicycle when we stop pedalling it.
Why does the sole of the shoe wears out?
Mention any fwo kinds of changes that can be brought about in a body by force.
State an example, how force can change velocity of a body
While getting down a moving bus, why should a person run in the same direction as that of the
bus?
A runner presses the ground with his feet before he starts his run Idetly action and reaction in
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Calculate the net force acting on a bus boarded with passenger, of mass 2000kg moving with a
uniform velocity of 60 km.hr
Ir a balloon filled with mir and its mouth united, the air is released from its mouth in the
downward direction, and balloon moves upwards. Identify action and reaction in this case.
Rakesh tries to push a box on a rough floor but is unable to move it Name the force which
balances the force applied by him.
During the game of table tennis, ir the ball hits a player it does not hurt him. On the other hand
when a fast moving cricket ball hits a spectator it may hurt him. State the reason
A motor car of mass 1200 kg is moving along a straight line with uniform velocity of 90 km/h.
lis velocity is slowed down to 18 km/h in 4s by an unbalanced external force. Calculate the
acceleration and change in momentum. Also calculate the magnitude of extemal force acting on
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13) A body of mass I kg is kept af rest. A constant force of 6 N starts acting on it. Find the time
taken by the body to move through a distance of 12 m.
State reason for the following:
i) All the cars are provided with seat belts.
ii) it is dangerous to move out of a moving bus.
ii) Road accidents at high speeds are very much worse than accidents at low speeds.
15) State Newton's first law of motion and use it to explain how:
1) Dust comes out of the carpet when it is beaten with a stick?
m) Leaves fall when branch of tree is shaken vigorously?
16) a) Define momentum. Derive its SI unit. How is force expressed in terms of momentum?
(Please answer this question)​

Answer 1

Answer:

No one will answer such a big questions so don't expect we will waste our time