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 11
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.
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?
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 best explains why momentum is conserved in a closed system? (1) Because energy is always conserved (2) Because there are no external forces (3) Because mass is always conserved (4) Because velocity is always constant
Which of the following is an example of conservation of momentum in daily life? (1) A car accelerating (2) A swimmer pushing off the wall (3) A ball rolling down a hill (4) Water boiling
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 perfectly inelastic collision, the colliding objects ________ after the collision.
Fill in the blank: Momentum is defined as the product of mass and ________.
Fill in the blank: The momentum of an object is zero if its ________ is zero.
Fill in the blank: The SI unit of momentum is ________.
Is it possible for the total kinetic energy of a system to change during a collision while the total momentum remains constant?
True or False: In a two-body collision, the sum of the momenta of the two bodies before the collision is equal to the sum after the collision.
True or False: In an inelastic collision, kinetic energy is always conserved.
True or False: The law of conservation of momentum applies only to collisions between solid objects.
