Question

6. Calculate the acceleration of body which increases its speed from 5 m/s to 15 m/s in 5 s

7. A body falls freely from a height of 20 m from the earth's surface. In what time will it reach the ground?

Take g = 10 m/s2

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Answer 1

6.Initial velocity  u=5 m/s

Final velocity  v=25 m/s

Time  t=5 s

Using   v=u+at

Or   25=5+a×5

⟹ a=4 m/s  

2

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