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Conservation of Momentum

Physics ⇒ Mechanics

Conservation of Momentum starts at 9 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Conservation of Momentum. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 11
A 0.2 kg ball moving at 10 m/s hits a wall and bounces back at 8 m/s. What is the change in momentum of the ball?
A 0.5 kg ball moving at 2 m/s collides with a 0.5 kg ball at rest. If the collision is perfectly elastic, what are their velocities after the collision?
A 1.5 kg object moving at 6 m/s collides head-on with a 2.5 kg object moving at -4 m/s. What is the total momentum before the collision?
A 10 kg object moving at 1 m/s collides with a 5 kg object moving at -2 m/s. What is the velocity of the combined mass if they stick together after the collision?
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 2 kg object moving at 5 m/s collides elastically with a 1 kg object at rest. What is the velocity of the 2 kg object after the collision?
A 3 kg object at rest explodes into two pieces: one of 1 kg moving at 6 m/s to the right. What is the velocity of the other piece?
A 4 kg object moving at 5 m/s collides with a 2 kg object at rest. If the collision is perfectly elastic, what is the velocity of the 2 kg object after the collision?
A 5 kg cart moving at 4 m/s collides with a 3 kg cart moving at 2 m/s in the same direction. What is the total momentum before the collision?
Describe the difference between elastic and inelastic collisions in terms of momentum and kinetic energy conservation.
Describe what happens to the momentum of two objects in a closed system when they collide and no external forces are present.
Explain why a gun recoils when it is fired, using the law of conservation of momentum.
Explain why external forces must be absent for momentum to be conserved in a system.
State the law of conservation of momentum.
A 0.1 kg bullet is fired horizontally at 400 m/s into a stationary 2.9 kg wooden block resting on a frictionless surface. The bullet becomes embedded in the block. What is the final velocity of the block-bullet system?
A 0.2 kg ball is dropped from a height and bounces off the ground with a velocity equal in magnitude but opposite in direction to its velocity just before impact. Assuming the collision with the ground lasts 0.01 s, what is the average force exerted by the ground on the ball if the speed just before impact is 10 m/s?
A 0.3 kg ball moving at 6 m/s collides with a 0.7 kg ball at rest. If after the collision, the 0.3 kg ball moves at 2 m/s in the same direction, what is the velocity of the 0.7 kg ball?
A 0.5 kg ball moving at 12 m/s collides with a 1.5 kg ball at rest. If the collision is perfectly elastic, what are the velocities of both balls after the collision?
A 0.5 kg ball moving at 8 m/s collides with a 0.5 kg ball moving at -4 m/s. If the collision is perfectly elastic, what are the velocities of both balls after the collision?
A 1 kg ball moving at 5 m/s collides head-on with a 2 kg ball moving at -3 m/s. If the collision is perfectly inelastic, what is their final velocity?