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A constant retarding force of 50 N is a...

A constant retarding force of 50 N is applied to a body of mass 20 kg moving inintially with a speed of `15ms^(-1)` . How long does the body take to stop ?

Text Solution

Verified by Experts

Here , F = - 50 N , m = 20 kg
u = `15ms^(-1) `, v = 0 , t = ?
From `F=ma,a =(F)/(m)=(-50)/(20)=-2.5ms^(-2)`
From `v=u+at,0=15-2.5t`
`t=(15)/(2.5)=6s`
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