A box M = 20 kg) is sitting on a horizontal surface. It is connected to a massless hook by a light string passing over a massless pulley wheel. The coefficients of friction between the box and the surface are 0.80 static) and 0.30 kinetic). If 15 kg in total) are placed on the hook, calculate the acceleration of the box. A) 9.8 m/s² B) 4.4 m/s² C) 2.5 m/s² D) 12 m/s² E) 0

Question

Quizplus · Accepted Answer

The net force on the system is the gravitational force on the 15 kg mass minus the kinetic friction force on the 20 kg box. The acceleration is calculated using Newton's second law.

A Box M = 20 Kg) Is Sitting on a Horizontal