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3 Conservation of energy

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Question 25

An electric drill is used to drill one hole in a wall. During this time its rotating parts speed up from rest, and some energy is transferred away by sound waves.

Energy change or transferEnergy in J\mathrm{J}J
Energy supplied electrically1800
Increase in kinetic store of the rotating parts12
Energy transferred by sound waves6

How much energy is transferred to thermal stores?

[1]
A

1788 J1788\ \mathrm{J}1788 J

B

1782 J1782\ \mathrm{J}1782 J

C

1818 J1818\ \mathrm{J}1818 J

D

1794 J1794\ \mathrm{J}1794 J

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3 Conservation of energy Questions

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

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