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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 12
A 0.2 kg ball moving at 5 m/s collides with a 0.3 kg ball moving at -2 m/s. What is the total momentum after the collision if the system is isolated?
A 0.5 kg ball moving at 4 m/s collides elastically with a stationary 0.5 kg ball. What is the velocity of the first ball after the collision?
A 1.5 kg ball moving at 2 m/s collides with a 2.5 kg ball at rest. If the collision is perfectly inelastic, what is their common velocity after the collision?
A 10 kg object at rest explodes into two fragments of 6 kg and 4 kg. If the 6 kg fragment moves at 5 m/s, what is the velocity of the 4 kg fragment?
A 2 kg object moving at 3 m/s collides head-on with a 1 kg object at rest. If they stick together after the collision, what is their final velocity?
A 3 kg cart moving at 2 m/s collides with a 2 kg cart moving at -1 m/s. If the collision is perfectly elastic, what is the velocity of the 3 kg cart after the collision?
A 4 kg object moving at 3 m/s collides with a 2 kg object moving at -2 m/s. If the collision is elastic, what is the velocity of the 2 kg object after the collision?
A 5 kg object moving at 6 m/s collides with a 3 kg object moving at 2 m/s in the same direction. What is the total momentum of the system before the collision?
A bullet of mass 0.01 kg is fired at 400 m/s from a gun of mass 2 kg. What is the recoil velocity of the gun?
Describe a real-life example where conservation of momentum is observed.
Describe the difference between elastic and inelastic collisions in terms of energy and momentum conservation.
Explain why external forces must be absent or negligible for momentum to be conserved in a system.
Explain why momentum is a vector quantity.
Explain why the total momentum of a system changes if an external force acts on it.
If the net external force on a system is zero, what happens to the total momentum of the system?
State the law of conservation of momentum.