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Could u pls solve this solve this doubt urgently? Thank you!
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Asked by nethra.v2005 | 05 Aug, 2019, 02:56: PM
answered-by-expert Expert Answer

Initial velocity u = 20 m/s

Final velocity v = 0

Distance travelled s = 10 cm = 0.1 m

Let acceleration be 'a'.

Using the third equation of motion,

v2 - u2 = 2as

We get,

(0)2 - (20)2 = 2(a) (0.1)

a = -(400/0.2) m/s2

a = -2000 m/s2

Thus, retardation = 2000 m/s2 

Negative sign indicates that it is retardation. 

Answered by Shiwani Sawant | 05 Aug, 2019, 03:32: PM

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