Collisions Question Preview (ID: 44675)


Inelastic And Elastic Collisions. TEACHERS: click here for quick copy question ID numbers.

What is a collision?
a) Two objects repelling each other
b) Two external forces creating movement of an object
c) Two objects traveling away from each other
d) Two objects coming in contact with each other

An example of an inelastic collision is __
a) When two atoms collide so violently that they explode.
b) A piece of clay thrown at a window and sticking to it
c) Two cars crashing into each other
d) All of these are inelastic collisions

The definition of an elastic collision is __
a) A collision in which the colliding objects cause deformation or stick together
b) A collision in which objects bounce off each other without causing deformation or sticking to occur
c) None of these answers
d) Both of these answers

An example of an elastic collision is __
a) When two pool balls collide and fly off in different directions
b) When two atoms collide so violently that they explode
c) When two cars crash into each other
d) When your physics teacher gets mad and throws a piece of clay at the wall, to which the clay sticks

When you say momentum is conserved between two objects, you mean that __
a) when two objects collide, the mass and velocity of each object will not change
b) when an impulse acts on an object, its momentum will change
c) momentum can be stored
d) If no external forces act on them, then the total momentum before a collision is the same as the total momentum after

The definition of the law of conservation of momentum is __
a) In the absence of an external force, the momentum of a system remains unchanged
b) The momentum of a system can never change
c) In the presence of an external force, the momentum of a system remains unchanged
d)

A bowling ball hitting a pin is an example of a __ collision
a) Inelastic
b) Elastic
c)
d)

A piece of chewed gum getting stuck to a shoe is an example of a __ collision
a) Inelastic
b) Elastic
c)
d)

In the absence of external forces, momentum is conserved in___
a) neither in an elastic nor an inelastic collision
b) only an inelastic collision
c) either in an elastic or an inelastic collision
d) only an elastic collision

Two skaters stand facing each other. One skater’s mass is 60 kg, and the other’s mass is 72 kg. If the skaters push away from each other without spinning, ______
a) the lighter skater has less momentum.
b) their momentums are equal but opposite.
c) their total momentum doubles
d) their total momentum decreases

When two objects interact in a collision, ___________
a) momentum is always conserved.
b) momentum is never conserved.
c)
d)

The law of conservation of momentum states ____
a) the total initial momentum of all objects interacting with one another usually equals the total final momentum.
b) the total initial momentum of all objects interacting with one another does not equal the total final momentum
c) the total momentum of all objects interacting with one another is zero
d) the total momentum of all objects interacting remains the same before and after a collision

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