A machine has an efficiency of 0.25. The useful output energy transfer of the machine is 60 J. What is the total input energy transfer to the machine?
[1]
A
15 J
B
85 J
C
240 J
D
300 J
Markscheme
1.2 Conservation and dissipation of energy Questions
40 exam-style questions on AQA GCSE Physics 1.2 Conservation and dissipation of energy, covering 1.2.1 Energy transfers in a system and 1.2.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.