science
Grade-9
Easy

Question

The acceleration of the body whose v-t graph is given below is ____ m/s2.

  1. 4 over 5
  2. 5 over 4
  3. 3 over 2
  4. 2 over 3

hintHint:

4/5 m/s²

The correct answer is: 4 over 5


    Given:
    initial velocity = 20m-1
    Final velocity = 60ms-1
    Time taken = 50s
    To find:
    Acceleration =?
    Solution: 
    A c c e l e r a t i o n space equals space fraction numerator space v space minus space u space over denominator t end fraction space equals space fraction numerator 60 space minus space 20 space over denominator 50 space end fraction space equals space fraction numerator 40 over denominator 50 space end fraction
A c c e l e r a t i o n space equals space 4 over 5
    Answer:
    Acceleration of the body is 4/5 ms-2

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