Vocabulary
Mass in motion
Momentum
Which object has more momentum?
Object A: a marble with a mass of 3g moving 4 m/s
Object B: a marble with a mass of 6g moving 4 m/s
Object B
When is momentum conserved during a collision
Momentum in a collision is conserved when there are no external forces acting on the objects outside of the system
A toy car is released from the top of a table and is at the half-way mark along a ramp to the ground. Which types of energy are present in this scenario?
Kinetic Energy
Gravitational Potential Energy
What happens to the gravitational potential energy of a roller coaster car as you are pulled up the first hill at constant speed.
Gravitational potential energy increases
Energy stored for later use
Potential Energy
Object A: a 1kg marble moving 100 m/s
Object B: a 10 kg brick moving 8 m/s
Object A
Two balls with equal mass are moving in opposite directions at equal speeds. The balls collide head on and immediately stop. In this collision is momentum conserved?
Yes momentum before and after the collision is 0
A basketball is at rest on the gym floor. Which types of energy are present in this scenario
There is no energy present
What happens to the gravitational potential energy as a roller coaster car is falling down the first hill on the track?
gravitational potential energy decreases
Energy of moving objects
Kinetic Energy
The speed of a constant mass object is increasing, then what is happening to the momentum?
momentum is incresing
A blue car with a mass of 5kg moving 3 m/s west collides with a red car with a mass of 5kg moving 3 m/s east. After the collision both cars bounce off each other. The blue car starts moving 2m/s east and the red car starts moving 2m/s west. What is the total momentum of the system before and after the collision? Is momentum conserved?
momentum before collision: 0
momentum after collision: 0
momentum is conserved
A car moves quickly on a flat street. Which types of energy are present in this scenario.
What happens to kinetic energy as a roller coaster car is pulled up the first hill at constant speed?
kinetic energy remains constant
The amount of time a force is acting on an object
Impulse
A car is moving eastward and slowing down. What is happening to the momentum of the car
Momentum is decreasing
An object with a mass of 10kg moving right at 10m/s collides with an object with a mass of 20kg moving 3m/s to the left. What will the final momentum of the system be after the collision. Assume there are no external forces acting on the objects.
Momentum= 40 kg.m/s right
A roller coaster is momentarily stationary at the top of the first drop of a tall rollercoaster hill. Which type of energy is present in this situation.
Gravitational Potential Energy
What happens to the kinetic energy as a roller coaster car is falling down the first hill on the track?
Kinetic energy increases
The speed and direction an object is moving
velocity
Rank these objects in order of greatest to least momentum:
Object A: mass of 1 kg with a velocity of 2 m/s right
Object B: mass of 4 kg with a velocity of 2m/s right
Object C: mass of 2 kg with a velocity of 2 m/s right
B>C>A
Why does falling on a trampoline hurt less than falling onto a concrete floor.
The trampoline allows more time for your velocity to slow down which results in less force.
When you knock your book off of your desk. What is happening to the kinetic energy and gravitational potential energy as it falls to the ground.
Kinetic energy increases
Gravitational potential energy decreases
A rollercoaster car is pulled out of the station up the first hill and falls down to the bottom of the first hill.
When does the roller coaster car have the greatest velocity?
At the bottom of the first hill.