EASY
9th Telangana Board
IMPORTANT
Earn 100

Write few daily life examples in which you observe conservation of energy.

Important Questions on Work and Energy

MEDIUM
9th Telangana Board
IMPORTANT
Physical Science Class 9>Chapter 10 - Work and Energy>Let us Improve our learning>Q 4
Draw a diagram to show conservation of mechanical energy in case of a free-falling body.
EASY
9th Telangana Board
IMPORTANT
Physical Science Class 9>Chapter 10 - Work and Energy>Let us Improve our learning>Q 5
Give some examples for renewable sources of energy.
MEDIUM
9th Telangana Board
IMPORTANT
Physical Science Class 9>Chapter 10 - Work and Energy>Let us Improve our learning>Q 1
A man carrying a bag of total mass 25 kg climbs up to a height of 10 m in 50 seconds. Calculate the power delivered by him on the bag.
MEDIUM
9th Telangana Board
IMPORTANT
Physical Science Class 9>Chapter 10 - Work and Energy>Let us Improve our learning>Q 2
A 10 kg ball is dropped from a height of 10 m. Find (a) the initial potential energy of the ball. (b) the kinetic energy just before it reaches the ground and (c) the speed just before it reaches the ground.
EASY
9th Telangana Board
IMPORTANT
Physical Science Class 9>Chapter 10 - Work and Energy>Let us Improve our learning>Q 3
Calculate the work done by a person in lifting a load of 20 kg from the ground and placing it 1 m high on a table.
EASY
9th Telangana Board
IMPORTANT
Physical Science Class 9>Chapter 10 - Work and Energy>Let us Improve our learning>Q 4
Find the mass of a body which has 5 J of kinetic energy while moving at a speed of 2 m s-1.
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?