Question

Read the passage below and answer the questions:

During the game of table tennis if 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. A truck at rest does not require any attention when parked along a roadside. But a moving truck, even at speeds as low as 5 m/s, may kill a person standing in its path. A small mass, such as a bullet may kill a person when fired from a gun. These observations suggest that there exists some physical quantity that depends on the mass and velocity of an object which is also responsible for the impact created by the moving object. Change in this physical quantity can change the state of rest or motion of an object.

1) Name the physical quantity described in the paragraph and state its SI unit. (1)

2) How is this physical quantity mathematically related to Force? (1)

3) A force of 10 N acts on a mass m for 0.1s and another force 1 N acts on a mass of 2m for 1s. In which case the above said physical quantity changes more? Show your calculations.​

Answer 1

Answer:

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