4. Study the given diagram and answer the following questions. I Rest 5 m/s 8 m/s 12 m/s 15 ml O sec I sec 2 sec 3 sec 4 se s Fig. 2.12:
what type of velocity is given in diagram
calculate the average velocity of the car
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Explanation:
(i) OA represents uniform acceleration
(ii) AB represents constant speed.
(iii) BC represents uniform retardation.
(iv) Acceleration of car from O to A= slope of line OA
a=
10−0
40−0
=4m/s
2
(v) Acceleration of car from A to B is zero as it has uniform speed during this time.
(vi) Retardation of car from B to C= slope of line BC
a=
50−30
0−40
=
20
−40
=−2m/s
2
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