Question

A body of mass 4 kg accelerates from 15 m/s to 25 m/s in 5 s due to the application of a force on it. Calculate the magnitude of this force (in N).

(a) 32

(b) 8

(c) 16

(d) 64

Answer 1

Correct option is (b) 8

As, we know that, F = ma

\(= m \times (\frac{v - u}t)\)

\(= 4 \times (\frac{25 - 15}5)\)

\(= 4 \times 2\)

\(= 8 N\)