EASY
9th Telangana Board
IMPORTANT
Earn 100

Find the mass of a body which has 5 J of kinetic energy while moving at a speed of 2 m s-1.

Important Questions on Work and Energy

EASY
9th Telangana Board
IMPORTANT
Physical Science Class 9>Chapter 10 - Work and Energy>Let us Improve our learning>Q 5
A cycle together with its rider weighs 100 kg. How much work is needed to set it moving at 3 m s-1?
EASY
9th Telangana Board
IMPORTANT
Physical Science Class 9>Chapter 10 - Work and Energy>Let us Improve our learning>Q 6
Which of the renewable sources of energy would you think suitable to produce in your native place? Why?
EASY
9th Telangana Board
IMPORTANT
Physical Science Class 9>Chapter 10 - Work and Energy>Let us Improve our learning>Q 1
What is potential energy? Derive an equation for gravitational potential energy of a body of mass m at a height h.
MEDIUM
9th Telangana Board
IMPORTANT
Physical Science Class 9>Chapter 10 - Work and Energy>Let us Improve our learning>Q 2
What is kinetic energy? Derive an expression for the kinetic energy of a body of mass m moving at a speed v.
MEDIUM
9th Telangana Board
IMPORTANT
Physical Science Class 9>Chapter 10 - Work and Energy>Let us Improve our learning>Q 3
When you lift a box from the floor and put it on an almirah the potential energy of the box increases but there is no change in its kinetic energy. Is it violation of conservation of energy? Explain.
EASY
9th Telangana Board
IMPORTANT
Physical Science Class 9>Chapter 10 - Work and Energy>Let us Improve our learning>Q 4
When an apple falls from a tree what happens to its gravitational potential energy just as it reaches the ground? After it strikes the ground?
EASY
9th Telangana Board
IMPORTANT
Physical Science Class 9>Chapter 10 - Work and Energy>Multiple choice questions>Q 1

S.I unit of work

EASY
9th Telangana Board
IMPORTANT
Physical Science Class 9>Chapter 10 - Work and Energy>Multiple choice questions>Q 2
The energy possessed by a body by virtue of its motion is called as