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1st Equation of Motion

A body of mas...

Question

A body of mass 1 kg is traveling with a velocity of $3 \frac{m}{s}$ accelerates uniformly to acquire a velocity of $8 \frac{m}{s}$ in 2 s. Find the force acting on the body.

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Solution

$F = m a$
And putting the values of m, u, v and t from the question,

$F = \frac{m (v - u)}{t} = \frac{1 (8 - 3)}{2} = 2.5 N$

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