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1 Energy

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Question 12
a.

A gymnast falls towards a trampoline.

Complete the sentences. Choose answers from the box:

[ chemical | elastic potential | gravitational potential | kinetic | nuclear ]

  • As the gymnast falls, there is a decrease in her ____________________ energy.
  • As the gymnast falls, there is an increase in her ____________________ energy.
[2]
b.

As the gymnast lands on the trampoline, each spring stretches 0.02 m0.02\text{ m}0.02 m. The spring constant of each spring is 80 000 N/m80\,000\text{ N/m}80000 N/m.

Calculate the energy stored by each spring.

Use the equation:

elastic potential energy=0.5×spring constant×(extension)2 \text{elastic potential energy} = 0.5 \times \text{spring constant} \times (\text{extension})^2 elastic potential energy=0.5×spring constant×(extension)2
[2]
c.

There are 48 springs on the trampoline.

Calculate the total energy stored by the 48 springs when each spring is stretched by 0.02 m0.02\text{ m}0.02 m. Use your answer from Part 2.

[2]
d.

The kinetic energy of the gymnast as she lands on the trampoline is 650 J650\text{ J}650 J. The maximum kinetic energy of the gymnast after she bounces is 48%48\%48% of her kinetic energy as she lands.

Calculate the maximum kinetic energy of the gymnast after she bounces.

[2]
e.

Why is the kinetic energy of the gymnast after she bounces less than her kinetic energy as she lands? Select one option:

  • Energy is not conserved.
  • Energy is transferred to the surroundings.
  • The springs transfer energy to the gymnast.
[1]
Markscheme

1 Energy Questions

  1. GCSE
  2. /Physics
  3. /1 Energy

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