. A car initially at rest starts moving with a constant acceleration of
0.5 ms-2 and travels a distance of 36 m. Find its final velocity.
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Given :
- Car is initially at rest [u =0]
- Acceleration of the body is 0.5 m/s² [a = 0.5 m/s²]
- Distance travelled is 49m [s = 49m]
To find :
- Final velocity of the body
- Time taken by the body
SOLUTION :
Firstly lets calculate the time taken by the body through the second equations of motion
✞ s = 49
✞ u = 0
✞ a = 0.5
Substituting the values,
So, time taken by the body is 14 s
From,
First equations of motion we find the final velocity of the body :-
✞ u = 0
✞ a = 0.5 m/s²
✞ t = 14 s
So , final velocity of the body is 7 m/s
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