A car moves from rest. The graph gives information about the speed, v metres per second,
of the car t seconds after it starts to move.
251
(i) Calculate an estimate
of the gradient of the
graph at t = 25
Give your answer as
a decimal.
(3)
20-
15
Speed (m/s)
10
(ii) Which one of the
following does your
answer to part (1)
represent?
(1)
A rate of change
B m/s/s
C increase in speed
D acceleration
40
Total marks:
5
o
5
10
15
30
35
20 25
Time (seconds)