EASY
9th Chhattisgarh Board
IMPORTANT
Earn 100

Explain potential energy and establish its equation.

Important Questions on Work and Energy

EASY
9th Chhattisgarh Board
IMPORTANT
Science (Theory & Practical) Class-9>Chapter 12 - Work and Energy>Exercise>Q 7
If the velocity of a particle is doubled, what will be its kinetic energy?
EASY
9th Chhattisgarh Board
IMPORTANT
Science (Theory & Practical) Class-9>Chapter 12 - Work and Energy>Exercise>Q 7
If the work done on the particle is zero, then what will be its velocity?
EASY
9th Chhattisgarh Board
IMPORTANT
Science (Theory & Practical) Class-9>Chapter 12 - Work and Energy>Exercise>Q 8
On applying brakes of a car which is moving at a speed v, it stops after covering a distance d. Calculate, what will be the distance covered by the car after applying brakes if it was moving at a speed of 2v.
EASY
9th Chhattisgarh Board
IMPORTANT
Science (Theory & Practical) Class-9>Chapter 12 - Work and Energy>Exercise>Q 9
A man holds a sack of rice on his head for 30 minutes and gets tired. Has he done any work? Explain your answer with reasons.
EASY
9th Chhattisgarh Board
IMPORTANT
Science (Theory & Practical) Class-9>Chapter 12 - Work and Energy>Exercise>Q 10
On applying a force of 8 Newton on a body, it moves in the direction of motion and displaces for 4 meters. Calculate the work done.
EASY
9th Chhattisgarh Board
IMPORTANT
Science (Theory & Practical) Class-9>Chapter 12 - Work and Energy>Exercise>Q 11
A body of 10 kg mass is raised against gravitational force of earth to a height of 10 m. How much work is done (in joules) in this case? (g=10 ms2)
EASY
9th Chhattisgarh Board
IMPORTANT
Science (Theory & Practical) Class-9>Chapter 12 - Work and Energy>Exercise>Q 12
Two bodies of masses 10 kg and 15 kg are raised to a height of 5 m and 2 m respectively above the surface of earth. Calculate the change in their potential energy in joules.
EASY
9th Chhattisgarh Board
IMPORTANT
Science (Theory & Practical) Class-9>Chapter 12 - Work and Energy>Exercise>Q 13

By using the information given in the figure, calculate the velocity of the ball at the position D. (use the law of conservation of mechanical energy).
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