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CBSE Class 9 Answered

A marble rolling on a smooth floor has an initial velocity of 0.4 m/s. If the floor offers a retardation of 0.02 m/s2, calculate the time it will take to come to rest.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer

Initial velocity (u) = 0.4 m/s

Retardation (-a) = 0.02 m/s2

Final velocity = v = 0

Using first equation of motion, we get

v = u + at

0 = 0.4 - 0.02t

Answered by | 04 Jun, 2014, 03:23: PM
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