State the law of conservation of momentum.

Important Questions on Force and Laws of Motion

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 2 - Force and Laws of Motion>Exercise>Q 12

Write the equation describing the principle of conservation of momentum.

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 2 - Force and Laws of Motion>Exercise>Q 1

State Newton’s second law of motion in terms of change in momentum.

EASY

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 2 - Force and Laws of Motion>Exercise>Q 2

Explain the meaning of the equation in physics:
$\mathrm{F}=ma$, where symbols have their usual meanings.

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 2 - Force and Laws of Motion>Exercise>Q 3

Mass of a body is doubled. What happens to its acceleration under a given force?

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 2 - Force and Laws of Motion>Exercise>Q 4

Explain why a cricket player moves his hands backwards while catching a fast cricket ball?

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 2 - Force and Laws of Motion>Exercise>Q 5

Why road accidents at high speeds are more worse than accidents at low speeds?

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 2 - Force and Laws of Motion>Exercise>Q 6

Explain why a person is more likely to get hurt when falling on the cemented road?

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 2 - Force and Laws of Motion>Exercise>Q 7

A feather of mass $10 \mathrm{g}$ is dropped from a height. It is found to fall down with a constant velocity. What is the net force acting on it?