Question

A constant force acting on a body of mass 4 kg changes its velocity from 2m/s to 4m/s in 4 second. What is force ?​

Answer 1

Answer:

The force acting on the body can be solved by using Newton’s 2nd law of motion. The formula is Force = mass * acceleration. The mass = 4kg while the value of the acceleration a = (v2 - v1) / t.

Solving for the acceleration a

a = (v2 - v1) / t

a = (4m/s - 2 m/s) / 4s

a = 2 m/s / 4s

a = 0.5 m/s^2

Solving for the net force F that acts on the body

Force = mass * acceleration

Force =4 kg * 0.5 m/s^2

Force = 2 N

The net force is equal to 2 N.

Hope it helps.

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