Definitions
The concept that the amount of momentum before a collision should equal the amount of momentum after a collision.
What is the Law of Conservation of Momentum
Given PE = m x g x h, what variable (ability to change) determines the amount of potential energy for a single object?
height
Which has more Kinetic Energy, a ball moving at 3 m/s or 5 m/s?
What is 5 m/s?
In calculating PE problems, the unit used for mass?
kg
What is the momentum of a 2000 kg car moving at 10 m/s?
20,000 kg m/s
What is potential energy?
Stored energy based on height
Calculate the PE of a rock that has a mass of 60 kg and is 10 m high.
What is 5880 J
Determine the kinetic energy in a 7 kg ball thrown with a velocity of 21 m/s.
What is 1543.5 Joules?
What is the unit for momentum?
What is Kilogram meter per second?
How much momentum does a parked car have?
0. An object must be moving to have momentum.
What is kinetic energy?
Kinetic energy is motion
How much potential energy would a 3 kg table have if it's at the top of a hill 117 m high?
What is 3439.8 J
The computer weighs 3 kg and is thrown at a velocity of 5 m/s. Calculate the Kinetic energy.
What is 37.5 Joules?
In calculating KE problems, the unit used for velocity
What is m/s?
Two cars collide head on. What must be true of one of the velocities?
One of the velocities must be negative if they are going in opposite directions.
Two friends on skateboards are facing each other and push off with their hands (elastic collision) What happens
Bounce off in opposite directions
Which has more potential energy, a calculator on the ground or a calculator on the table 1.5 m high?
What is on the table. (greater height)
Where on a roller coaster is the kinetic energy the greatest?
The bottom
Unit is used for PE and KE
What are Joules (or newton meter)?
A 2,000 kg parked car is hit by a 2,000 kg car moving at 5 m/s. What is the total momentum after the collision?
10,000 kg m/s.
The type of collision when two cars collide and stick together.
What is inelastic collision?
Where is the potential energy the greatest on a roller coaster?
The top
Susie's pencil weighs 0.05 kg and is dropped from the table 1 m high. The pencil falls at a velocity of 9.8 m/s. What is the pencil's KE?
What is 2.401 J?
What is the unit of measurement used for height?
meter
What two things make up momentum?
velocity and mass