Newton's laws, friction, banked roads, free-body diagrams.
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Q1 · Laws of Motion (Class 11) · HARD
Two blocks A and B of masses 2 kg and 3 kg are connected by a string passing over a frictionless pulley. Block A rests on a smooth incline of angle 30° while B hangs vertically. The acceleration of the system is: (g = 10 m/s²)
Q2 · Laws of Motion (Class 11) · EASY
A body of mass 5 kg is acted upon by a constant force of 20 N for 3 seconds. The change in momentum is:
Q3 · Laws of Motion (Class 11) · MEDIUM
A block of mass 10 kg is placed on a rough horizontal surface with coefficient of friction μ = 0.4. The minimum horizontal force required to just move the block is: (g = 10 m/s²)