Question

A 20 N unbalanced force causes an object to accelerate at 1.5 m/s2. What is the mass of the object?

Answer 1

As per Newton's II law we know that

$F = ma$

here we know that

$F = 20 N$

$a = 1.5 m/s^2$

now the mass of the object will be given as

$m = \frac{F}{a}$

$m = \frac{20}{1.5}$

$m = 13.3 kg$

so mass of the object will be 13.3 kg