Question

When a force acts on a body of mass 100g, the change in its velocity is 20 cm/s The magnitude of this force is .......... N?
(A) 0.2
(B) 0.02
(C) 0.002
(D) 2.0

Answer 1

Force =mass *acceleration

Answer 2

Concept:

An object having mass changes its velocity in response to a push or pull. Force is an external agent that has the power to alter a body's resting or moving condition. It has a size and a movement.

Given:

The mass of the body is 100 grams and the change in velocity when a force acts on the body is 20 cm/s.

Find:

The magnitude of the force.

Solution:

The mass of the body, m = 100 g = 0.1 kg

The change in velocity of the body per second is:

a = 20 cm/s = 0.2 m/s

Now, force is defined as the product of mass and the acceleration of the body.

Therefore,

f = ma

f = (0.1)(0.2)

f = 0.02 N

The magnitude of the force acting on the body is 0.02 N.

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