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(where necessary assume g = 9.8m s^-2.)

The graph below shows how the velocity of a car v, varies with time, t.
v/ms
15
10
5
10
20
30
40
50
t/s
Use the graph to calculate:
a) the acceleration of the car between 40 and 50 seconds.
b) the total distance travelled by the car during the 50 second journey.

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