Conservation of energy (AQA A-Level Physics): Quizzes

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Conservation of energy
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What does the conservation of energy principle state?

Energy cannot be created or destroyed

In a closed system, what happens to the total energy?

It remains constant

What is the formula for gravitational potential energy?

Ep=m×g×ΔhE_p = m \times g \times \Delta h

What is the formula for kinetic energy?

Ek=12mv2E_k = \frac{1}{2} m v^2

What value is used for gravitational field strength gg?

9.819.81 m/s²

What happens to a ball's velocity at its highest point when thrown upward?

It becomes zero

As a ball rises after being thrown upward, what energy transfer occurs?

KE to GPE

How do resistive forces affect energy conversion?

They transfer energy to surroundings as heat

Calculate ΔEp\Delta E_p for a 22 kg object raised 55 m. (g=9.81g = 9.81 m/s²)

98.198.1 J

If a pendulum has 0.50.5 J of GPE at the top, what is its KE at the bottom (ignoring air resistance)?

0.50.5 J

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