State Newton’s third law of motion and give two examples to illustrate the law.

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 9

How are action-reaction forces related in magnitude and direction?

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 2 - Force and Laws of Motion>Exercise>Q 10

When a person jumps out of a boat, the boat moves backwards, why?

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 2 - Force and Laws of Motion>Exercise>Q 11

Since action-reaction forces are always equal in magnitude and opposite in direction, how can anything ever be accelerated?

MEDIUM

9th CBSE

IMPORTANT

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

In a collision between a heavier body and a lighter body, which body experiences greater force? Which body undergoes the greater change in momentum? Also, which body is damaged more?

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 2 - Force and Laws of Motion>Exercise>Q 13

While flying, birds push the air downwards with their wings. Give reason.

EASY

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 2 - Force and Laws of Motion>Exercise>Q 14

If a balloon is filled with air and its mouth untied, then air is released from its mouth in the downward direction. Write the other observations made by you. Justify your answer.

EASY

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 2 - Force and Laws of Motion>Exercise>Q 15

William was having a gun-shoot session in a training camp. As soon as he shot a bullet, he fell backwards. Sanat started making fun of him, William stood up and explained the cause of this effect and told him not to laugh without understanding the scientific cause behind it.

Read the above passage and answer the following question:
What explanation did William give to Sanat?

EASY

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 2 - Force and Laws of Motion>Exercise>Q 15

William was having a gun-shoot session in a training camp. As soon as he shot a bullet, he fell backwards. Sanat started making fun of him, William stood up and explained the cause of this effect and told him not to laugh without understanding the scientific cause behind it.

Read the above passage and answer the following question:
Compare and contrast the values of William and Sanat.