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8 Energy – forces doing work

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Question 53

A motorboat moves 30 m in the direction of a constant thrust of 400 N. The kinetic energy of the motorboat increases by 9.0 kJ. What energy is transferred to thermal stores by water resistance during this motion?

[1]
A

9.0 kJ9.0\ \mathrm{kJ}9.0 kJ

B

12 kJ12\ \mathrm{kJ}12 kJ

C

21 kJ21\ \mathrm{kJ}21 kJ

D

3.0 kJ3.0\ \mathrm{kJ}3.0 kJ

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8 Energy – forces doing work Questions

  1. GCSE
  2. /Physics
  3. /8 Energy – forces doing work

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