A sled weighing 12 kg is acted upon in the horizontal direction by a force of 10H.

A sled weighing 12 kg is acted upon in the horizontal direction by a force of 10H. With what acceleration does the sled move if the friction force is 4H.

To find out the acceleration with which the sled should move, consider the equality: mc * a = Fr = Fg – Ftr, whence we express: a = (Fg – Ftr) / mc, where Fg is the applied horizontal force (Fg = 10 N); Ftr – friction force (Ftr = 4 N); mс – sled weight (mс = 12 kg).

Let’s perform the calculation: a = (Fg – Ftr) / mс = (10 – 4) / 12 = 0.5 m / s2.

Answer: The sled must move with an acceleration of 0.5 m / s2.