Real exam questions on gravitational potential energy, kinetic energy, mechanical energy and its conservation - swings, tracks, pendulums, skateboards and falling objects. Use g = 9,8 m/s². Keep a calculator handy.
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Maths Maestrifx‑MAESTRI · NATURAL DISPLAY
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What this quiz covers
Grade 10 Physical Sciences: Energy Quiz 2 draws its questions at random from 22 questions across these topics:
Definitions
Potential energy
Conservation
Pendulum
Kinetic energy
Mechanical energy
Example questions
A sample of the questions you will practise in this quiz. Work them out yourself - the full solution appears after you answer each one.
Which statement is the correct definition of gravitational potential energy?
Vusi, of mass 45 kg, wants to reach an apple 2,5 m above the ground. He sits on a swing whose seat is 1,15 m above the ground, and his friend pushes him. Ignore friction. Calculate Vusi's gravitational potential energy on the swing before he is pushed.
Vusi, of mass 45 kg, wants to reach an apple 2,5 m above the ground. He sits on a swing whose seat is 1,15 m above the ground, and his friend pushes him. Ignore friction. Calculate the minimum speed at which he must be pushed to reach the apple.
Vusi, of mass 45 kg, wants to reach an apple 2,5 m above the ground. He sits on a swing whose seat is 1,15 m above the ground, and his friend pushes him. Ignore friction. Why can the equations of motion NOT be used to calculate this speed?
Vusi, of mass 45 kg, wants to reach an apple 2,5 m above the ground. He sits on a swing whose seat is 1,15 m above the ground, and his friend pushes him. Ignore friction. Vusi lowers the seat of the swing closer to the ground. The speed he must now be pushed at to reach the apple is ...