Newton's laws, friction, free-body diagrams, dynamics on inclines.
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Q1 · Laws of Motion · EASY
A body of mass 5 kg is acted upon by a net force of 20 N. The acceleration of the body is:
Q2 · Laws of Motion · HARD
A block of mass 10 kg is placed on a rough horizontal surface with coefficient of friction 0.4. A horizontal force of 50 N is applied. The frictional force acting on the block is (g = 10 m/s²):
Q3 · Laws of Motion · MEDIUM
Two blocks of masses 4 kg and 6 kg are connected by a string passing over a frictionless pulley. The acceleration of the system is (g = 10 m/s²):