A body with a mass of 5m, moving with an acceleration of 0.3 m / s ^ 2 Find the traction force

A body with a mass of 5m, moving with an acceleration of 0.3 m / s ^ 2 Find the traction force if the coefficient of friction to movement is 0.04.

Given:

m = 5 kilograms – body weight;

a = 0.3 m / s ^ 2 – acceleration with which the body moves;

k = 0.04 – coefficient of friction;

g = 10 m / s ^ 2 – acceleration of gravity.

It is required to determine the thrust force Fthrust (Newton) acting on the body.

According to Newton’s second law:

F thrust – F friction = m * a;

F draft – k * m * g = m * a;

Fthrust = m * a + k * m * g = m * (a + k * g) = 5 * (0.3 + 0.04 * 10) =

= 5 * (0.3 + 0.4) = 5 * 0.7 = 3.5 Newtons.

Answer: a traction force acts on the body, equal to 3.5 Newtons.