Question

4. If two balls of same masses are dropped on sand,
the depths of penetration is same if
1. Heavier ball is dropped faster than lighter ball
11. Lighter ball is dropped faster than heavier ball
III. The product 'my' is same for both bodies
IV. None of these
7. A fielder giving a swing while catching a ball is an
example of
1. Inertia
11. Momentum
III. Newton's Il law of motion
IV. Newton's I law of motion
8. Action and reaction forces
1. Act on the same body
II. Act on different bodies
III. Act in same direction
IV. Both I and III​

Answer 1

Answer:

4.None of these

7.Inertia

8.Act on different bodies

Explanation:

4.This was already explained by Galileo from his experiment

7.A fielder gives a swing while catching a ball because he experience a smaller force for a longer interval of time thus resulting a lesser impulse on his hands

8.Newton's third law states " for every action, there is an equal and opposite reaction.They always act on two different bodies"