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Question
Study the speed-time graph of a car given alongside and answer the following questions:
(i) What type of motion is represented by OA ?
(ii) What type of motion is represented by AB ?
(iii) What type of motion is represented by BC ?
(iv) What is the acceleration of car from O to A ?
(v)What is the acceleration of car from A to B ?
(vi) What is the retardation of car from B to C ?
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Solution
(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 = ((40-0))/((10-0))
= 4 "m/s"^2`
(v) Acceleration of car from A to B is zero as it has uniform speed .
(vi) Retardation of car from B to C = slope of line BC
`a = ((40-0))/((50-30)) "m/s"^2`
= `2 "m/s"^2`
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