Work, Power, and Efficiency
Quiz
•
Physics
•
11th Grade
•
Practice Problem
•
Hard
+3
Standards-aligned
Charles Martinez
FREE Resource
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15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
What is the definition of power?
Power is a comparison of how much energy is used to do work versus how much is lost or wasted to the environment.
Power means that you are in charge.
Power is the ability to lift things up and put them down.
Power is the rate at which someone, or something, uses energy.
2.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
What is the unit for Power?
Joules
Volts
Watts
Amps
3.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
If Mr. P runs up a flight of stairs with a height of 10 meters in 5 seconds and Mr. P’s twin brother who has the same mass runs up the same flight of stairs in 4 seconds. Who has more power?
Ms. Poteete
Mr. P
Mr. P's twin brother
Ms. Millard
4.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
If Mr. P’s dog Ally has a mass of 50 kg and runs up a flight of stairs with a height of 10 meters in 2 seconds and Ms. Poteete’s dog Jasper has a mass of 25 kg and runs up the same flight of stairs in the same amount of time. Which dog has more power?
Jasper
Ally
Air Bud
Scout
5.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
How much wasted energy is there in this Sankey diagram?
100 J
75 J
50 J
25 J
Tags
NGSS.HS-PS3-1
6.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
If a light bulb with an efficiency of 80% lights up the room and 16 J of energy is converted to light energy and 4 J of energy is lost to thermal energy. What is the total energy in the system?
80%
4 J
20 J
16 J
Tags
NGSS.HS-PS3-1
NGSS.HS-PS3-2
NGSS.HS-PS3-4
7.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
An engine has an inout of 5000 W. The useful output is 4000W. Calculate its percentage efficiency.
90%
80%
75%
85%
Tags
NGSS.MS-PS3-5
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