KE, GPE & EPE (AQA GCSE Physics Combined Science): Quizzes

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KE, GPE & EPE
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When does an object have energy in its kinetic energy store?

When it is moving

Which two factors does the amount of kinetic energy depend on?

Mass and velocity

What is the formula for calculating kinetic energy?

Ek=12mv2Ek = \frac{1}{2}mv^2

What are the units for velocity in the kinetic energy formula?

metres per second (m/s)

When does an object gain gravitational potential energy?

When lifted in a gravitational field

Which factors does gravitational potential energy depend on?

Mass, height & field strength

What is the formula for gravitational potential energy?

Ep=mghEp = mgh

What is Earth's gravitational field strength approximately?

9.8 m/s²

When does an object gain elastic potential energy?

When stretched or squashed

What is the formula for elastic potential energy?

Ee=12kx2Ee = \frac{1}{2}kx^2

What are the units for spring constant?

newtons per metre (N/m)

A wire (10 cm, k=5 N/m) stretches to 12 cm. What is the elastic potential energy?

0.001 J

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