Answer to Question #18418 in Electric Circuits for Mark

Question

An object with a mass of 50 kg is being dragged along a horizontal floor by a horizontal force of 30 N. If the friction force opposing the motion is a steady 20 N, what is the acceleration of the body

Answer 1

According to the second Newton's law the acceleration of an object is

a = F/m = (30[N]-20[N])/50[kg] = 0.2[m/s²].