Question

(a) What can be depicted from the graph regarding the
motion of the object?
(b) Find the value of acceleration from the graph.​

Answer 1

Answer:

negative acceralation can be determined it's an example of freely falling body

Answer 2

(a) The graph shows that the body is retarding with time that is velocity of motion is reducing with time

(b) Acceleration of body is -1.25 m s⁻²

Explanation:

• Graph showing negative slope indicates that body is retarding which means the velocity of the body is reducing with time hence we get negative slope
• In given graph value of velocity at t=0 sec is 50 m s⁻¹ and at t = 40 sec is zero although the graph is a straight line which shows that motion is uniform and retarding

(a) Body is retarding that is having negative acceleration

(b) Acceleration of the body is given as slope of velocity-time graph

              acceleration = $\frac{change in velocity}{time taken}$

  => Acceleration = $\frac{final velocity-initial velocity}{time taken}$

  => Acceleration = $\frac{0-50}{40-0}$

  => Acceleration = $\frac{-50}{40}$

  => Acceleration = $\frac{-5}{4}$

  => Acceleration = -1.25 ms⁻²

or retardation = 1.25 ms⁻²

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