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- 1. Multiple ChoiceWhen energy moves from one form to another it is said to be _________________TransformedEliminatedLost.Created
- 2. Multiple ChoiceThe energy associated with motion is calledKinetic energyElastic potential energyGravitational potential energyNuclear energy
- 3. Multiple Choice
When you rub your hands together on a cold day, you use friction to convertMechanical energy into thermal energyThermal energy into nuclear energyNuclear energy into electrical energy.Electrical energy into radiant energy - 4. Multiple Choice
Which of the following has kinetic energy?
a rock poised for a fall
an archer's bow that is drawn back
a rolling bowling ball
A spring that has been compressed
- 5. Multiple ChoiceEnergy of a rock perched on a cliff is an example of...gravitationalelasticchemicalkinetic
- 6. Multiple ChoiceEnergy from a compressed spring would be an example of...kineticelasticgravitationalchemical
- 7. Multiple Choice
How much work is being done with 200 N of force to the right on object that moves 426 meters to the right? (assume the force and displacement are in the same direction)
85,200 J
45,620 J
90,480 J
62,329 J
- 8. Multiple ChoiceGravitational potential energy depends on the ________ and ________ of the object.Height and massFriction and movementMass and MovementHeight and Friction
- 9. Multiple ChoiceWhen you release a stretched rubber band, the rubber band has ________ energy.kineticpotentialnone of the aboveall of the above
- 10. Multiple Choice
What is the formula for calculating the total amount of mechanical energy?
ME = KE + PE
KE = ME + PE
PE = mgh
ME = 1/2 mv2
- 11. Multiple Choice
When you pull back the lever on a pinball machine and then release it to launch the ball up a ramp, which of the following energy transformations occurred? (Select all that apply)
Kinetic --> Gravitational Potential
Elastic Potential --> Gravitational Potential
Kinetic --> Elastic Potential
Chemical Potential --> Kinetic
Elastic Potential --> Kinetic
- 12. Multiple Choice
A force of 80 N is used to pull a 10-kg block at an angle of 60 degrees (shown above) to the right. If the block moves 5 meters to the right, how much work was done on the block.
4000 N*m
200 N*m
2000 N*m
346.4 N*m
400 N*m
- 13. Multiple Choice
While training for breeding season, a 380 gram male squirrel does 32 pushups in a minute, displacing its center of mass by a distance of 8.5 cm for each pushup. Determine the total work done on the squirrel while moving upward (32 times).
103360 J
1.03 J
3230 J
10139 J
10.1 J
- 14. Multiple Choice
A 78-kg skydiver has a speed of 62 m/s at an altitude of 870 m above the ground. Determine the total mechanical energy of the skydiver.
816 kJ
15.0 kJ
666 kJ
668 kJ
500 kJ
- 15. Multiple Choice
If a spring is compressed from a natural length of 0.5 m to 0.1 m and has a spring constant of 640 N/m, what is the elastic potential energy stored in the spring?
80 J
128 J
51.2 J
160 J
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