Laws of Motion
Newton's three laws of motion; conservation of linear momentum and its applications; equilibrium of concurrent forces; static and kinetic friction; dynamics of uniform circular motion: centripetal force.
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Take a full mock →Q1 · Laws of Motion · EASY
A block of mass 5 kg is placed on a horizontal surface. A horizontal force of 20 N is applied to the block, but it does not move. If the coefficient of static friction between the block and surface is 0.5, what is the magnitude of the frictional force acting on the block? (Take g = 10 m/s²)
Q2 · Laws of Motion · EASY
A car of mass 1000 kg is moving on a circular track of radius 50 m with a constant speed of 20 m/s. What is the magnitude of the centripetal force acting on the car?
Q3 · Laws of Motion · MEDIUM
Two blocks of masses 3 kg and 5 kg are connected by a light inextensible string passing over a smooth pulley. The system is released from rest. What is the acceleration of the system? (Take g = 10 m/s²)
Q4 · Laws of Motion · MEDIUM
A block of mass 2 kg is sliding down an inclined plane of angle 30° with the horizontal. The coefficient of kinetic friction between the block and the plane is 0.2. What is the acceleration of the block down the plane? (Take g = 10 m/s² and √3 = 1.732)
Q5 · Laws of Motion · MEDIUM
A block of mass 4 kg is placed on a horizontal surface. A horizontal force of 20 N is applied on the block. If the coefficient of kinetic friction between the block and the surface is 0.3, what is the acceleration of the block? (Take g = 10 m/s²)