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WorksheetsLesson 50: Energy Quiz
Total questions: 20
Worksheet time: 13mins
How much work is required to push with a force of 3 newtons over a distance of 40 meters? (Include units in your answer.)
(a)
How much kinetic energy does a 4kg ball rolling at 3 m/s have? (Include units in your answer.)
(a)
How much gravitational potential energy does a 3kg ball have if it is at rest atop a 5 m roof. Earth's gravity is 9.8m/s/s. (Include units in your answer.)
(a)
What is the total mechanical energy of a 5kg ball that is moving 3m/s at a height of 8 meters?
(a)
The diagram shows a 50 kg skater on a frictionless track. She begins at rest at a height of 4 meters above the ground (at point A). How fast is the skater moving when she is at a height of 1.5m?
2 m/s
5 m/s
7 m/s
10 m/s
If a go-kart requires 500 joules of fuel, but only is able to output 200 joules of kinetic energy in the motion of the go-kart, what is the efficiency of the go-kart?
20%
40%
80%
250%
A generator can generate 900J of electrical energy every 5 minutes. How many watts of power are generated?
3 watts
60 watts
180 watts
1.21 gigawatts
Two Sankey Diagrams for incandescent light bulbs and LED light bulbs are shown. According to the diagrams, which type of light bulb has a greater efficiency?
Incandescent light bulbs are more efficient.
LED light bulbs are more efficient.
They have the same efficiency.
A roller coaster car goes down a friction-less track. At which point is the potential energy the greatest?
point A
point B
point C
point D
point E
A roller coaster car goes down a friction-less track. At which point is the car traveling the fastest?
point A
point B
point C
point D
point E
A tennis ball is dropped. What is the proper sequence of energy as it transforms (as you read the diagram from left to right)?
gravitational PE to KE to elastic PE to KE to gravitational PE
elastic PE to gravitational PE to KE to gravitational PE
gravitational PE to elastic PE to KE to gravitational PE
KE to elastic PE to gravitational PE to elastic PE
The picture shows a tennis ball right before it bounces upwards. What type of energy does the ball show? (Choose the best answer. Look carefully at the ball's shape!)
gravitational potential energy
kinetic energy
elastic potential energy
radiant energy
Which has more kinetic energy: a 0.04kg bullet going 500m/s, or a 4kg bowling ball going 50m/s?
The bullet has more KE.
The bowling ball has more KE.
Their kinetic energy is equal.
Before a trebuchet is fired, it stores energy chiefly as...
elastic potential energy.
gravitational potential energy.
chemical potential energy.
sound energy.
In a car at rest, energy is chiefly stored as...
elastic potential energy.
gravitational potential energy.
chemical potential energy.
magnetic potential energy.
When a stick of dynamite explodes, the chemical potential energy is transformed into... (choose the best answer)
motion energy
sound energy
heat energy
light energy
all of the above
When a puck is slid across the ice, it will eventually slow down and stop because its kinetic energy transforms ultimately into... (choose the best answer)
thermal energy.
acoustic energy.
radiant energy.
electrical energy.
A gasoline-fueled electric generator makes 900J of energy in 2 hours. A solar generator makes 900J of energy in 6 hours. Which has more POWER?
The gasoline-fueled generator has more power.
The solar generator has more power.
They make the same energy, so they have the same power.
A rollercoaster car starts at the top of its first hill at rest with 1000J of potential energy. A minute later it has 300J of PE and 600J of kinetic energy. How much energy was lost as thermal energy?
(a)
A spring (with a spring constant of 20N/m) is compressed 0.9 meters. How much elastic potential energy is stored in the compressed spring? (Include units in your answer.)
(a)
