Question

what type of motion is represented by AB?
What type of motion is represented by BC?
Find out the acceleration of the body?
Calculate the retardation of the body.
Find out the distance travelled by the body form A+B​

Answer 1

Answer:

(i) State of Motion while AB = Rest

(ii) State of Motion while BC = Deceleration

(iii) Acceleration of body = 1.25 m/s²

(iv) Retardation of body = -0.83333333... m/s²

(v) Distance traveled by body from A to B = 30 m

Explanation:

(i) Time is increasing and but velocity is not so the object is at rest.

(ii) Velocity is decreasing so the body is decelerating or retarding.

(iii) The body has accelerated only from O to A

     According to first equation of motion,

     v - u / t = a

     5 - 0 / 4 = a

     Therefore, a = 1.25 m/s²

(iv) The body has retarded only from B to C

     According to the first equation of motion,

     v - u / t = a

     0 - 5 / 6 = a

     Therefore, a = 0.83333333...m/s²

(v) The area (rectangle) under the graph is the displacement

    Area of rectangle = l*b

    So, 5*6 = 30 m