High School

The velocity-time graph for a cycle is shown.

101

8

Velocity (m/s)

6

4-

2-

0-

02 4 6

8 10 12 14 16 18 20

Time (seconds)

a) Work out the total distance travelled on the cycle.

b) Work out the acceleration in the last 8 seconds.

57

The velocity time graph for a cycle is shown 101 8 Velocity m s 6 4 2 0 02 4 6 8 10 12 14

Answer :

Answer:

a) Total distance = (1/2)(10)(20 + 6) = 5(26)

= 130 meters

b) Acceleration in the last 8 seconds =

(10 - 0)/(12 - 20) = -10/8 = -1 1/4 m/sec²

= -1.25 m/sec²

In the last 8 seconds, the cycle

decelerated at a rate of -1.25 meters per

second per second.

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