EASY
8th ICSE
IMPORTANT
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The energy stored in an object due to its raised position is known as elastic potential energy.

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Important Questions on Energy

EASY
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 4 - Energy>Check your progress>Q A
A ball thrown from a balcony possesses kinetic energy.
EASY
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 4 - Energy>Check your progress>Q B
A ball of mass 400 g is thrown at a speed of 2 m s-1. Determine its kinetic energy.
MEDIUM
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 4 - Energy>Check your progress>Q B
A motorbike moving at a speed of 12 ms has a kinetic energy of 3600 J. Determine its mass.
EASY
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 4 - Energy>Check your progress>Q B
A child lifts a book of mass 1 kg from the table to a cupboard at the height of 2 m from the floor. What is the potential energy of the book with respect to the floor?g=9.8 m s-2
MEDIUM
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 4 - Energy>Check your progress>Q B
What is the speed of a runner of mass 50 kg whose kinetic energy while running is 2500 J?
MEDIUM
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 4 - Energy>Check your progress>Q B
A child climbs a wall of height 4 m. He now possesses a potential energy of 1600 J. What is the mass of the child? g=9.8 m s-2
EASY
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 4 - Energy>Exercises>Q A
In which of the following situations, no work is said to be done?
EASY
8th ICSE
IMPORTANT
Living Science Physics 8>Chapter 4 - Energy>Exercises>Q A
No work is said to be done if the angle between the directions of force and displacement is