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 ?

Answer 1

(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`