A body at rest at the initial moment is acted upon for 0.2 s by a force of 50 N.

A body at rest at the initial moment is acted upon for 0.2 s by a force of 50 N. As a result, the body acquires a speed of 50 m / s. Determine your body weight.

Given:

t = 0.2 seconds – the time during which the force F acts on the body;

F = 50 N – the magnitude of the force F;

V = 50 m / s – the speed that the body receives under the action of the force F.

It is required to find the body mass m (kilogram).

Since, according to the condition of the problem, the body was initially at rest, that is, the initial velocity was equal to 0, we find the acceleration:

a = (V – V0) / t = V / t = 50 / 0.2 = 250 m / s ^ 2.

m = F / a = 50/250 = 0.2 kg.

Answer: body weight is 0.2 kg.