Momentum
Calculating Momentum
Momentum Conservation
Laws
Collisions
100
Momentum = Mass x _________
velocity
100
What is the momentum of a 60-kg halfback moving eastward at 9 m/s.
540 kg•m/s, east
100
Is this true for elastic or inelastic collisions, or both?
BOTH
100
This property describes an object’s resistance to a change in motion and depends only on mass.
Answer: What is inertia?
100
In this type of collision, objects bounce apart with little loss of kinetic energy.
Answer: What is an elastic collision?
200
The change in velocity is related to the negative reciprocal of an object's _________.
mass
200
Momentum of a 1000-kg car moving at 20 m/s.
20 000 kg•m/s
200
True/False
For any collision occurring in an system, momentum is conserved.
true
200
The law states that total momentum before an interaction equals total momentum after the interaction.
Answer: What is the Law of Conservation of Momentum?
200
In this type of collision, objects stick together or deform.
Answer: What is an inelastic collision?
300
True/False
An object's momentum is indirectly proportional to an object's velocity (as one increases, the other decreases)
false
300
A car possesses 20 000 units of momentum. What would be the car's new momentum if the velocity doubled?
40,000 units of momentum
300
A large truck collides with a small bicycle.
Which vehicle experiences the greatest force of impact?
both have the same
300
Newton’s law that explains how force is related to changes in momentum.
Answer: What is Newton’s Second Law of Motion?
300
Momentum is __________ in all collisions.
Answer: What is conserved?
400
The letter for momentum is ____________
p
400
A car possesses 20 000 units of momentum. What would be the car's new momentum if its mass was doubled (by adding more passengers),
40,000 units of momentum
400
A large truck collides with a small bicycle.
Which vehicle experiences the largest change in momentum?
both change momentum the SAME amount! (one increases momentum, other decreases by the same)
400
The Newton’s law that explains why momentum is conserved during interactions.
Answer: What is Newton’s Third Law of Motion?
400
Kinetic energy is usually lost in this type of collision.
Answer: What is an inelastic collision?
500
Momentum is a vector quantity which shows _____________ and magnitude.
direction
500
A 60 kg quarterback is running at 3 m/s down the field.
A 90 kg halfback is running at 2 m/s down the field.
Which player has the most momentum?
neither, both players have the same momentum.
500
A large truck collides with a small bicycle.
Which vehicle experiences the largest change in velocity?
The bicycle
Bicycle's mass is smaller so change in velocity must be greater
500
This equation shows force as the rate of change of momentum.
Answer: What is
F=Δp/Δt?
500
This is clear evidence that car crashes are not elastic collisions.
Answer: What is deformation of the vehicles (crumpling, heat, sound)?