A power–time graph for a cyclist encloses an area of between and

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A power–time graph for a cyclist encloses an area of

1.2\times10^{4}\,\text{J}

between

t=0

and

t=40\,\text{s}

. What does this area represent? (a) Average power developed over

40\,\text{s}

(b) Instantaneous power at

t=40\,\text{s}

40\,\text{s}

(d) Total mechanical energy of the cyclist at

t=40\,\text{s}