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Multiple choice
T/F
Completion
Problem
Popcorn
100
A bus engine transfers chemical potential energy into __________ so that the bus moves. a. electrical b. thermal c. gravitational potential d. kinetic
What is kinetic (D)
100
Energy in the form of motion is potential energy.
What is (False)---kinetic
100
Stored energy is called _________________ energy.
What is ----potential
100
The formula to solve for mechanical energy is __________.
What is ---- ME = KE + GPE
100
Energy is measured in _______________.
What is -------- joules
200
The SI unit for energy is the ______________. a. calorie b. meter c. joule d. ampere
What is joule (c)
200
Chemical potential energy is stored in a stretched rubber band.
What is (False)----Elastic potential
200
A fire warms you by transferring ____________energy.
What is -----thermal
200
A 18-kg bicycle carrying a 55-kg girl is traveling at a speed of 6 m/s. What is the kinetic energy of the girl and bicycle?
What is ------- 1,314 J
200
You can calculate GPE with what equation?
What is -------- mass x gravity x height
300
Which of the following devices does not make use of electrical energy? a. digital camera b. upright piano c. radio d. toaster
What is upright piano (b)
300
Mechanical energy is the total potential and kinetic energy in a system.
What is (True)----mechanical
300
On a swing your potential and kinetic energies change, but your ______________ energy does not.
What is------ mechanical
300
A 88-kg ceiling light is suspended 5 m above the floor. What is its gravitational potential energy?
What is ---------- 4,312 J
300
If an object has energy, this means that the object has the ability to cause _____________.
What is ---------change
400
According to the law of conservation of energy, the total amount of energy in the universe _______________. a. remains constant b. increases c. changes constantly d. decreases
What is remains constant (a)
400
Energy stored in food you eat is chemical potential energy.
What is (True)-----chemical potential
400
You can determine how much energy various foods can give you be checking their _____________ content.
What is ----calorie
400
A 72-kg boy is sitting 5 m from the ground in a tree. What is his gravitational potential energy?
What is ----------- 3,528 J
400
Describe the changes in mechanical energy as you run up a flight of steps.
What is -bottom of steps GPE is zero, run up the steps KE is transferred back to PE, at top of steps GPE is 100% and KE is 0%
500
In a nuclear fusion reaction, mass is transformed into ____________. a. light b. nuclei c. energy d. matter
What is energy (c)
500
According to the law of conservation of energy, mechanical energy can be changed to heat energy.
What is (True)----changed
500
An 21-kg bicycle carrying a 64-kg girl is traveling at a speed of 7 m/s. What is the kinetic energy of the girl and bicycle?
What is ----------- 2,082.5 J
500
A dump truck, a sports car, and a bicycle are traveling at the same velocity. Compare their kinetic energies.
What is ------given that the velocities are the same; the dump truck has the most mass so has most KE, then the sports car, and the bicycle last