Newton's laws, friction, free-body diagrams.
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Q1 · Laws of Motion (Class 11) · EASY
Newton's first law of motion is also known as:
Q2 · Laws of Motion (Class 11) · MEDIUM
A block of mass 5 kg is placed on a rough horizontal surface with coefficient of friction μ = 0.3. The minimum horizontal force required to just move the block is (g = 10 m/s²):
Q3 · Laws of Motion (Class 11) · HARD
Two blocks of masses m₁ = 4 kg and m₂ = 2 kg are connected by a massless string passing over a frictionless pulley. The acceleration of the system is (g = 10 m/s²):