A constant regarding force of 50N is applied to a body of mass 20kg moving initially with a speed of 15m/s. What time does the body take to stop?
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"good speed of 15m/s"???
Retardation (a) = F/m = 2.5 m/s^2
= 50/20
Now, use v = u + at
0 = 15+ (-2.5)t
t = 15/2.5
t = 6 seconds
It takes 6s for body to stop.
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