EASY
9th CBSE
IMPORTANT
Earn 100

What kind of energy is possessed in the following situation?

 An arrow held in a stretched bow.

Important Questions on Work and Energy

EASY
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 4 - Work and Energy>EXERCISE>Q 3
A sparrow and a crow are having the same kinetic energy during a flight. Which of the two is moving fast and why ?
EASY
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 4 - Work and Energy>EXERCISE>Q 1
Give one example, where a body is in motion, yet it possesses no energy.
EASY
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 4 - Work and Energy>EXERCISE>Q 1
Is the energy a scalar or a vector quantity?
MEDIUM
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 4 - Work and Energy>EXERCISE>Q 1

What happens to the potential energy of the body, if it's

(a) height is doubled

(b) mass is increased by three times 

(c) the body is taken on the surface of the moon?

MEDIUM
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 4 - Work and Energy>EXERCISE>Q 2
A rocket is moving up with a velocity v. If the velocity of this rocket is suddenly tripled, what will be the ratio of two kinetic energies?
MEDIUM
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 4 - Work and Energy>EXERCISE>Q 3
 The weight of a person on a planet A is about half that on the earth. He can jump up to 0.4 m height on the surface of the earth. How high he can jump on the planet A ?
MEDIUM
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 4 - Work and Energy>EXERCISE>Q 4
A ball is dropped from a height of 10 m. If the energy of the ball reduces by 40% after striking the ground, how much high can the ball bounce back? (g=10 m s-2)
HARD
9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 4 - Work and Energy>EXERCISE>Q 1
A light and a heavy object have the same momentum. Find out the ratio of their kinetic energies. Which one has a larger kinetic energy?