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3.1 Energy stores and calculations

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Question 15

A parachutist of mass 75 kg falls through the air. The table shows measurements at two points, P and Q.

PointHeight above the ground in m\mathrm{m}mSpeed in m/s\mathrm{m/s}m/s
P120020
Q80040

Later, at a lower point R, the speed of the parachutist has decreased to 10 m/s.

Use g=10 N/kgg=10\ \mathrm{N/kg}g=10 N/kg.

a.

Calculate the energy transferred to the surroundings as the parachutist falls from P to Q.

[4]
b.

Explain why the energy transferred to the surroundings from Q to R is greater than the decrease in the gravitational store of the parachutist between these points.

[2]
Markscheme

3.1 Energy stores and calculations Questions

  1. GCSE
  2. /Physics
  3. /3.1 Energy stores and calculations

121 exam-style questions on Edexcel GCSE Physics 3.1 Energy stores and calculations, covering 3.1.1 Gravitational potential energy, 3.1.2 Kinetic energy, and 3.1.3 Energy transfers and conservation of energy. Each one has a worked solution and a mark scheme showing where the marks go.

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