Question

An object moves with an acceleration of $3\frac{m}{s^2}$ when a force of 30 N is applied. The mass of the body is ___ kg.

Answer 1

Let m be the mass of the body.

Given: F = 30 N, a = $3{ms}^{-2}$.
From First Law, F = ma.
$30=m\times 3$.
m = 10 kg.