How to calculate what speed should be given to a body whose friction force is 0.12 m = 0.12 kg

How to calculate what speed should be given to a body whose friction force is 0.12 m = 0.12 kg and the distance that it must cover is 2 m.

Initial data: Ffr (friction force) = 0.12 N; m (body weight) = 0.12 kg; S (distance that the body must travel) = 2 m; V0 (initial velocity of the body) = 0 m / s.

1) Determine the acceleration of the body: Ftr. = F = m * a and a = Ftr. / m = 0.12 / 0.12 = 1 m / s ^ 2.

2) We calculate the speed that must be given to the body: S = (V ^ 2 – V0 ^ 2) / 2a = V ^ 2 / 2a, whence V = √ (2a * S) = √ (2 * 1 * 2) = √ 4 = 2 m / s.

Answer: To cover a distance of 2 meters, the body must be given a speed of 2 m / s.