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- 1. Multiple Choice
At which point(s) on the roller coaster is the gravitational potential energy at its maximum?ABCD - 2. Multiple ChoiceAt which point(s) on the roller coaster is the kinetic energy at its maximum?ABCD
- 3. Multiple Choice
Work is equal to...
SELECT ALL THAT APPLY!
KE + PE
Change in energy
mg
Fd
- 4. Multiple ChoiceGravitational potential energy depends on the ________ and ________ of the object.
Height and mass
Friction and movement
Mass and Movement
Height and Friction
- 5. Multiple Choice
A girl weighs 400 N. She runs up a flight of stairs of height 5 m in 4 seconds. Her power is:
320 W
400 W
500 W
2 000 W
- 6. Multiple Choice
The Law of Conservation of Energy states that total amount of energy in a closed, isolated system will always...
stay the same
increase
decrease
cannot be determined
- 7. Multiple Choice
In order for work to be done, what MUST be true?
Force acts in the same dimension as the distance traveled.
Force and distance are in opposite dimensions
Force is greater than distance.
Distance is greater than force.
- 8. Multiple Choice
Which of the following is an example of work being done?
Teacher sitting in a chair
Keys hanging from a key chain
A man pushing a wall
A ball being rolled across the floor
- 9. Multiple Choice
Calculate the PE of a 2 kg cat perched 10 meters above the ground.
20J
200J
2.04J
200W
- 10. Multiple Choice
Two equal mass marbles are at the top of a frictionless ramp. One marble falls to the ground off the back while the other slides down the ramp. What is true about the marbles when they reach the ground?
The marble that rolled down the ramp is moving faster than the marble that fell.
The marble that fell down the back of the ramp is moving faster than the marble that rolled.
The marble that rolled down the ramp is not moving when it reaches the ground.
The two marbles are moving with the same speed.
- 11. Multiple Choice
A 40-kg person is climbing up a flight of stairs that are 3 m high in 6 seconds. How much work did they do climbing the stairs?
400 J
1200 J
200 J
120 J
- 12. Multiple Choice
A 40-kg person is climbing up a flight of stairs that are 3 m high in 6 seconds. How much power did they develop climbing the stairs?
400 W
1200 W
200 W
120 W
- 13. Multiple Choice
How high up is a 3200-kg plane if it has 960000 J of potential energy?
10 m
30 m
307200000 m
300 m
- 14. Multiple ChoiceEnergy of a rock perched on a cliff is an example of...
gravitational energy
elastic energy
chemical energy
kinetic energy
- 15. Multiple ChoiceEnergy from a compressed spring would be an example of...
kinetic energy
elastic energy
gravitational energy
chemical energy
- 16. Multiple Choice
Which statement best describes a machine?
It can increase Force, but not Energy
It can increase Energy, but not Force
It can increase Distance, but not Force
It can increase Force, but not distance
- 17. Multiple Choice
The law of conservation of energy is defined for what type of system?
An open, isolated system
An open, connected system
A closed, isolated system
A closed, connected system
- 18. Multiple Choice
Energy of an object in motion is an example of...
Kinetic
Potential
Elastic
Nuclear
- 19. Multiple Choice
A star does no work on a planet that travels around it in uniform circular motion. Why?
There is no force component parallel to the motion
There is no displacement of the planet
The planet does not accelerate
The star does not exert a force on the planet
- 20. Multiple Choice
Tarzan runs at 9 m/s and grabs a vertically hanging vine. He swings upwards. How high into the air does he swing? Ignore air resistance.
4.1 m
9.8 m
0.46 m
8.3 m
- 21. Multiple Choice
BONUS: We've taken a look at some powerful, push-up prone squirrels in this unit. While a real squirrel probably isn't busy getting ripped, they do have an impressive bite! Which of the following materials can a squirrel chew through?
SELECT ALL THAT APPLY!
Wood
Plastic
Aluminum
Steel
Cement
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