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8 Energy – forces doing work

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Question 49

A spring-loaded carriage is released and moves inside a sealed enclosure. The carriage, spring and enclosure are treated as a closed system. The only stores that change are the elastic potential, kinetic and thermal energy stores.

Energy storeEnergy before releaseEnergy after release
Elastic potential energy store of the spring480 J160 J
Kinetic energy store of the carriage0 J250 J
Thermal energy store of the enclosure120 JXXX

Calculate XXX.

[3]
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8 Energy – forces doing work Questions

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

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