Question

When a force acts on a body of mass 200 gram the change in its velocity is 15 cms per

second. The magnitude of this force is Newton.

(A) 0.3 (B) 0.003 (C) 0.03 (D)3 3.0 ​

Answer 1

Given:

A force acts on a body of mass 200 gram the change in its velocity is 15 cms per second.

To find:

Magnitude of force?

Calculation:

• First , let's find the acceleration: Acceleration is defined as the rate of change of velocity.

• Let the change occur in 1 second.

$\boxed{a = \dfrac{\Delta v}{\Delta t} = \dfrac{15}{1} = 15 \: cm/ {s}^{2} = 0.15 \: m/ {s}^{2} }$

Now, magnitude of force will be :

$F = m \times a$

$\implies \: F = \dfrac{200}{1000} \times 0.15$

$\implies \: F = 0.2 \times 0.15$

$\implies \: F = 0.03 \: N$

So, force is 0.03 N (option C)