Conservation of Momentum
Physics ⇒ Mechanics
Conservation of Momentum starts at 9 and continues till grade 12.
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See sample questions for grade 12
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.
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?
Which of the following best describes a perfectly inelastic collision? (1) Objects stick together after collision (2) Kinetic energy is conserved (3) Both objects rebound with equal speed (4) Momentum is not conserved
Which of the following best describes an elastic collision? (1) Only momentum is conserved (2) Only kinetic energy is conserved (3) Both momentum and kinetic energy are conserved (4) Neither is conserved
Which of the following is a necessary condition for the law of conservation of momentum to hold? (1) The system must be open (2) The system must be isolated (3) The system must be accelerating (4) The system must be at rest
Which of the following is conserved in an isolated system during a collision? (1) Kinetic energy (2) Momentum (3) Both (4) Neither
Fill in the blank: In a closed system, the total momentum before and after a collision is __________.
Fill in the blank: The momentum of an object is the product of its mass and __________.
Fill in the blank: The SI unit of momentum is __________.
Fill in the blank: The total momentum before a collision is __________ to the total momentum after the collision in an isolated system.
True or False: In a two-body collision, the sum of the momenta of the two bodies before the collision is always equal to the sum after the collision, provided no external forces act.
True or False: In an inelastic collision, the total kinetic energy of the system is always conserved.
True or False: The conservation of momentum applies to both linear and angular momentum.
True or False: The conservation of momentum is a consequence of Newton's third law of motion.
