Could u pls solve this solve this doubt urgently?

Thank you!

Asked by nethra.v2005 | 5th Aug, 2019, 02:56: PM

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)- (20)= 2(a) (0.1)

a = -(400/0.2) m/s2

a = -2000 m/s2

Thus, retardation = 2000 m/s

Negative sign indicates that it is retardation. 

Answered by Shiwani Sawant | 5th Aug, 2019, 03:32: PM