EASY
9th CBSE
IMPORTANT
Earn 100

Explain the following giving suitable reasons:

A rubber ball rebounds when struck against a hard floor.

Important Questions on Force and Laws of Motion

EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 2 - Force and Laws of Motion>Check Your Progress>Q 3

Discuss the conservation of momentum in the case given below:

Recoil of gun when fired.

 

EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 2 - Force and Laws of Motion>Check Your Progress>Q 3

Discuss the conservation of momentum in each of the following cases:

Launching of rocket from the ground.

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 2 - Force and Laws of Motion>Check Your Progress>Q 4
A bullet of mass 10 g moving with a velocity of 400 m/s gets embedded in a freely suspended wooden block of mass 900 g. What is the velocity acquired by the block?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 2 - Force and Laws of Motion>Check Your Progress>Q 5
A hunter fires a bullet of mass 10 g with a velocity of 400 m/s from a gun of mass 5 kg. What will be the recoil velocity of the gun?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 2 - Force and Laws of Motion>Check Your Progress>Q 6
An object of mass 2 kg travelling along a straight line with a velocity of 5 m/s collides with and sticks to a stationary wooden block of mass 8 kg. Then they both move off together in the same straight line. Calculate the total momentum just before the impact and just after the impact. Also calculate the velocity of the combined object.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 2 - Force and Laws of Motion>Higher Order Thinking Skills (HOTS) Questions>Q A
How much force is required to keep a body moving with constant speed on a frictionless surface?
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 2 - Force and Laws of Motion>Higher Order Thinking Skills (HOTS) Questions>Q A
When the two ends of a spring balance are pulled by two equal forces F, what is the force indicated on the spring balance?
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE PHYSICS 9>Chapter 2 - Force and Laws of Motion>Higher Order Thinking Skills (HOTS) Questions>Q A
Give an example in which momentum changes even though speed and mass remain the same.