Use the graph below to answer the question. The graph shows the motion of four cars along the road in front of a school. Predict the speed of car 2 at 6 seconds.
30 m/sec

20 m/sec

0 m/sec

40m/sec

40m/sec

Explanation:

Speed of car 30 meters/ sec. Car takes a U turns with same speed in six seconds,so in six seconds it turns through 180° therefore in one second it it will turn through 180/6=30°. Therefore change in velocity per second or

average acceleration

= v-v cos 30

=30–30cos 30

= 30- 25.98

= 4.02 m/s^2

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