EASY
9th CBSE
IMPORTANT
Earn 100

What are the various energy transformations that occur, when you are riding a bicycle?

Important Questions on Work and Energy

EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 4 - Work and Energy>Assignment>Q 20
State what happens to the kinetic energy of a moving ball, if it has to perform work against the force of friction?
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 4 - Work and Energy>Assignment>Q 21
Write the observed energy transformation that takes place in thermal power plant.
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 4 - Work and Energy>Assignment>Q 22
By how much will the kinetic energy of a body increase, if velocity is doubled?
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 4 - Work and Energy>Assignment>Q 23
Which would have a greater effect on the kinetic energy of an object-- doubling mass or doubling velocity?
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 4 - Work and Energy>Assignment>Q 24
How will the kinetic energy of an object change if its mass is halved and velocity is doubled?
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 4 - Work and Energy>Assignment>Q 25
Two bodies having equal masses are moving with uniform speeds of 2v and 3v respectively. Find the ratio of their kinetic energies.
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 4 - Work and Energy>Assignment>Q 26
If the velocity of a body is halved, what will be the change in its kinetic energy?
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 4 - Work and Energy>Assignment>Q 27

What kind of energy is possessed by:

(i) A book lying on top of bookshelf

(ii) Water stored in a dam

(iii) A cork up spring of an air gun

(iv) A fish moving in a water

(v) An electron moving around the nucleus