Q15 of 49 Page 9

Explain with an example that action and reaction acts on two different bodies.

When a person swims in water, he pushes the water backwards with hands and feet to move forward. It is the reaction to this force that pushes him forward. Here the action and reaction acts on two different bodies.

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13 Do all bodies have the same inertia? Explain it with an example. 14 How will we derive at the expression for Newton's second law of motion? 16 Is it true that two bodies can exert force on each other only when they are in contact? If not give an example. 17 Total momentum of a body remains unchanged before and after the collision. Explain.