Physics: Chapter 9: Question Preview (ID: 8630)

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Energy of motion.
a) Kinetic energy
b) Potential energy

Which of the following is NOT an example of potential energy?
a) a stretched rubber band
b) a book sitting on a shelf
c) a mousetrap that has been set
d) a moving car

If velocity is doubled, kinetic energy would be doubled.
a) False
b) True

An arrow in a bow has 70 J of potential energy. Assuming no loss of energy to heat/friction, how much kinetic energy will it have after it has been shot?
a) 70 J
b) 35 J
c) no way to tell
d) 10 J

How would the potential energy (with reference to the ground) of a ball sitting on a shelf change if you moved it to a higher shelf?
a) potential energy would increase
b) potential energy would decrease
c) potential energy would not change

How much power is required to do 40 J of work on an object in 5 seconds?
a) 8 W
b) 200 W
c) 80 W
d) 40 W

Which has greater kinetic energy, a car traveling at 30 m/s or a half-as-massive car traveling at 60 m/s?
a) 60 m/s car
b) Both have the same kinetic energy.
c) 30 m/s car

If you run up the stairs faster your power output will decrease.
a) False
b) True

What is the ultimate source of energy for the food we eat?
a) Sunlight
b) Water
c) Fertilizer

Kinetic and potential are both forms of mechanical energy.
a) True
b) False

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