Question

A force of hundred newton acting on a body for 5 seconds gives it a velocity of 20 m per second calculate the mass of body

Answer 1

Here,
$a = \frac{v_{f} - v_{i}}{t} \\ = \frac{20 - 0}{5} \\ a = 4 \: m \: {s}^{ - 2}$
and,
$F = ma \\ m = \frac{F}{a} \\ m = \frac{100}{4} \\ m = 25 \: kg$
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