MEDIUM
9th CBSE
IMPORTANT
Earn 100

Name the kind of energy stored in a dam?

Important Questions on Work and Energy

MEDIUM
9th CBSE
IMPORTANT
Secondary Physics>Chapter 5 - Work and Energy>EXERCISES>Q 10
What do you understand by a closed system?
MEDIUM
9th CBSE
IMPORTANT
Secondary Physics>Chapter 5 - Work and Energy>EXERCISES>Q 1

What is the work done by a coolie walking on a horizontal platform with a load on his head? Explain.

MEDIUM
9th CBSE
IMPORTANT
Secondary Physics>Chapter 5 - Work and Energy>EXERCISES>Q 2

Under what conditions the work done by a force is (i) maximum, (ii) minimum?

EASY
9th CBSE
IMPORTANT
Secondary Physics>Chapter 5 - Work and Energy>EXERCISES>Q 3

State the two factors on which kinetic energy depends.

MEDIUM
9th CBSE
IMPORTANT
Secondary Physics>Chapter 5 - Work and Energy>EXERCISES>Q 4

A body is thrown vertically upward. What happens to its KE (a) during the motion, (b) at the highest point?

 

MEDIUM
9th CBSE
IMPORTANT
Secondary Physics>Chapter 5 - Work and Energy>EXERCISES>Q 5

A man buys an electric motor of 10 horsepower rating

(i) What is the power of the motor in Watts?

(ii) How much work can the motor do in one second?

MEDIUM
9th CBSE
IMPORTANT
Secondary Physics>Chapter 5 - Work and Energy>EXERCISES>Q 6
How will you show that compressed spring has energy? What form of energy does it have?
MEDIUM
9th CBSE
IMPORTANT
Secondary Physics>Chapter 5 - Work and Energy>EXERCISES>Q 7
What is difference between potential energy and kinetic energy?