Dynamics
Physics ⇒ Mechanics
Dynamics starts at 10 and continues till grade 12.
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See sample questions for grade 12
A 0.5 kg ball moving at 10 m/s strikes a wall and rebounds with the same speed in the opposite direction. What is the change in momentum?
A 10 kg box is pulled with a force of 50 N on a horizontal surface. If the coefficient of kinetic friction is 0.2, what is the acceleration of the box? (Take g = 9.8 m/s²)
A 2 kg object moving at 3 m/s collides with a stationary 1 kg object. If they stick together after the collision, what is their final velocity?
A 3 kg object is moving in a circle of radius 2 m at a speed of 4 m/s. What is the magnitude of the centripetal force acting on it?
A 5 kg object is acted upon by a net force of 20 N. What is its acceleration?
A 50 kg person stands on a scale in an elevator accelerating upward at 2 m/s². What does the scale read? (Take g = 9.8 m/s²)
A block of mass 2 kg is sliding down a frictionless incline of angle 30°. What is the acceleration of the block? (Take g = 9.8 m/s²)
A car of mass 1000 kg accelerates from rest to 20 m/s in 10 seconds. What is the average force exerted by the engine?
A force of 15 N is applied to a 3 kg object at rest. What will be its velocity after 4 seconds?
Define momentum and give its SI unit.
Define the coefficient of friction.
Describe the concept of inertia with an example.
Explain the difference between static and kinetic friction.
Explain why a passenger feels pushed backward when a bus suddenly accelerates forward.
State Newton's First Law of Motion.
State Newton's Third Law of Motion.
