Questions on Energy Transitions
Q7. The drawings show a weightlifter. The stages in weightlifting are labelled A, B, C, D and E.
(a)
(i) Complete the sentences below.
As the weights were lifted up, energy was transferred from the man to the weights. This energy had been stored as chemical energy in the musclesof the man's arms.
2 marks
(ii) How was energy stored in the weights at stage C?
A |
as chemical energy |
B |
as elastic energy |
C |
as kinetic energy |
D |
as gravitational potential energy |
1 mark
(b) Complete the sentences below.
(i) In stage D, as the weights were falling, the energy was transferred from gravitational potential energy to kineticenergy.
Both must be correct for the mark
1 mark
(ii) In stage E, as the weights hit the floor, the energy was transferred from kinetic energy to sound OR thermal energy.
Both must be correct for the mark
1 mark
Maximum 5 marks
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