Collisions
Physics ⇒ Mechanics
Collisions starts at 10 and continues till grade 12.
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See sample questions for grade 11
Describe the difference between a head-on collision and a glancing collision.
Describe what happens to the kinetic energy in a perfectly inelastic collision.
Explain why momentum is conserved in collisions but kinetic energy may not be.
Explain why two objects of different masses do not necessarily have the same velocity after a collision.
A 0.5 kg ball moving at 2 m/s collides with a 0.5 kg ball moving at -1 m/s. If the collision is perfectly inelastic, what is their common velocity after the collision?
A 1 kg ball moving at 6 m/s collides elastically with a 2 kg ball at rest. What is the velocity of the 1 kg ball after the collision?
A 2 kg ball moving at 3 m/s collides head-on with a stationary 1 kg ball. If the collision is perfectly elastic, what is the velocity of the 1 kg ball after the collision?
A 3 kg cart moving at 4 m/s collides with a 2 kg cart at rest. If the collision is elastic, what is the velocity of the 3 kg cart after the collision?
Which of the following best describes a perfectly inelastic collision? (1) Both momentum and kinetic energy are conserved (2) Only momentum is conserved, and the objects stick together (3) Only kinetic energy is conserved (4) Neither momentum nor kinetic energy is conserved
Which of the following best describes the coefficient of restitution? (1) The ratio of final to initial kinetic energy (2) The ratio of relative speed after to before collision (3) The ratio of masses of colliding bodies (4) The ratio of momentum after to before collision
Which of the following is an example of a nearly elastic collision? (1) Two clay balls sticking together (2) Billiard balls colliding (3) A car crash (4) A ball of putty hitting the floor
Which of the following is NOT a characteristic of an elastic collision? (1) Kinetic energy is conserved (2) Momentum is conserved (3) Objects stick together (4) No permanent deformation occurs
Fill in the blank: In a collision, the total system momentum before the collision is ________ to the total system momentum after the collision.
Fill in the blank: In a perfectly elastic collision, the total kinetic energy ________ before and after the collision.
Fill in the blank: The coefficient of restitution is a measure of the ________ of a collision.
Fill in the blank: The equation for conservation of momentum in a two-body system is m₁u₁ + m₂u₂ = ________.
True or False: In a collision, the direction of momentum is always the same as the direction of velocity.
True or False: In a one-dimensional elastic collision between two objects of equal mass, the objects exchange their velocities.
True or False: In a perfectly inelastic collision, the colliding objects stick together after the collision.
True or False: In a two-dimensional collision, both the x and y components of momentum are conserved.
