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A constant force acting on a body of mas...

A constant force acting on a body of mass 3.0 kg changes its speed from 2.0 in `ms^(-1) " to " 3.5 m s^(-1) ` in 25 s . The direction of motion of the body remains unchanged . What is the magnitude and direction of the force ?

Text Solution

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m = 3.0 k , `u = 1.0 ms^(-1)`
`v = 3.5 ms^(-1), t = 25 s `
`F = m ((v-u)/t) = 3 ((3.5 -2)/25) `
` = (3xx15)/25 = (0.9)/5 = 0.18 N `
This force acts in the direction of the force .
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