Class ix work energy series -01 Solved

Short Questions 

Each question=1 mark 

1. How much work is done when a body of mass m is raised to a height h above the ground ?

2. Is energy is a vector quantity?

3. If the speed of a body is halved , what will be the change in its kinetic energy ?

4. What happens to  the potential energy of a body when it's height is doubled ?

5. Define 1Kw power.

6. A body does 1200 joule of work in 2 minutes.Calculate it's power.

7. Joule/ second is the unit of which quantity?

8. On what factor does the kinetic energy of a body depends?

9. Find the total work done by a body of 5kg mass moving in a circular path with constant speed of 20m/s for a complete revolution.

10. Find the momentum of a body of mass 100g having a kinetic energy of 20 Joule.

Solution: a)  video solution:  Solution of question bank set-01 work energy and power class 9 

               b) Hand written pdf solution

(N.B: video Solution is in Bengali language)