PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A 12N force pulls a sled along level ground. The displacement of the sled at various times is recorded below:
0m at 0s,
3m at 2s,
9m at 4s,
12m at 6s.
Between each pair of successive times the sled moves with uniform speed.
(a) Determine the speed of the sled in each time interval.
(b) Hence calculate the power developed by the force in each interval.
(c) Find the average power over the entire 6s.