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 9
Describe the difference between elastic and inelastic collisions in terms of momentum and kinetic energy.
Describe what happens to the momentum of a system if an external force acts on it.
Explain why momentum is conserved in a system with no external forces.
If a moving object collides with a stationary object of equal mass and sticks to it, what happens to their speed after the collision?
A 1 kg ball moving at 2 m/s collides with a 2 kg ball at rest. If the 1 kg ball comes to rest after the collision, what is the velocity of the 2 kg ball?
A 1 kg ball moving at 5 m/s collides head-on with a 1 kg ball moving at -3 m/s. What is the total momentum before the collision?
A 10 kg object at rest explodes into two pieces: one of 6 kg moves at 4 m/s to the right. What is the velocity of the other piece?
A 2 kg object moving at 5 m/s collides with a 3 kg object at rest. If they move together after the collision, what is their final velocity?
Which law explains why a gun recoils when it is fired? (1) Newton's First Law (2) Law of Conservation of Momentum (3) Law of Universal Gravitation (4) Law of Conservation of Energy
Which of the following best describes a perfectly inelastic collision? (1) Objects stick together after collision (2) Objects bounce off with no loss of kinetic energy (3) Only momentum is conserved (4) Both 1 and 3
Which of the following best describes an elastic collision? (1) Kinetic energy is lost (2) Momentum is not conserved (3) Both momentum and kinetic energy are conserved (4) Only mass is conserved
Which of the following is an example of conservation of momentum in daily life? (1) A rocket launch (2) A car braking (3) A ball rolling down a hill (4) Water boiling
If the net external force on a system is zero, the system's total momentum will ______.
If two objects collide in an isolated system, the total momentum before the collision is ______ the total momentum after the collision.
In a collision, the total momentum of the system is conserved only if ______ forces are absent.
The change in momentum of an object is called ______.
Is it possible for the total momentum of a system to change if an external force acts on it?
True or False: In an inelastic collision, the total kinetic energy is conserved.
True or False: Momentum is a scalar quantity.
True or False: The direction of momentum is always the same as the direction of velocity.
