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3 Conservation of energy

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Question 42
F

A skateboarder starts from rest at point A at the top of a ramp. She rolls down the ramp to point B at the bottom.

The Figure shows the ramp.

Figure

image

The total mass of the skateboarder and skateboard is 50 kg.

Gravitational field strength (ggg) = 10 N/kg

a.

Calculate the decrease in gravitational potential energy of the skateboarder and skateboard from A to B.

[2]
b.

The speed of the skateboarder at B is 5.0 m/s.

Calculate the kinetic energy of the skateboarder and skateboard at B.

[2]
c.

Calculate the energy dissipated as the skateboarder moves from A to B.

[2]
d.

Explain how the energy is dissipated.

[2]
e.

The skateboarder does not push off with her feet at any time.

Explain why she cannot reach the top of the right-hand side of the ramp.

[2]
Markscheme

3 Conservation of energy Questions

  1. GCSE
  2. /Physics
  3. /3 Conservation of energy

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