Conservation of Energy
Authored by John Compton
Physics
11th Grade
NGSS covered
Used 8+ times
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20 questions
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1.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
In physics, a (a) is a group of related objects that interact with each other and form a complex whole.
Tags
NGSS.HS-PS3-2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What term is used to describe a system that loses energy to objects that are not part of the system?
open
closed
raised
low
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A box is released from rest and slides down a ramp in a closed system. Even though the box speeds up, its kinetic energy at the bottom of the ramp is less than the potential energy that it had at the top of the ramp.
What best explains why the box’s final kinetic energy is less than its initial potential energy?
In a closed system, kinetic energy is always less than potential energy.
Some potential energy was converted into thermal energy due to friction.
The acceleration due to gravity became smaller as the box slid down the ramp.
In a closed system, total energy is constantly being lost to outside objects.
Tags
NGSS.HS-PS3-1
NGSS.HS-PS3-4
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the law of conservation of energy state about energy in a closed system?
Energy cannot be created or destroyed.
Energy can be created but not destroyed.
Energy can be destroyed but not created.
Energy can be either destroyed or created.
Tags
NGSS.HS-PS3-2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jonesy, a cat, has a favorite toy that is made up of a squeaky ball at the end of a string. The toy makes up a closed system. Ellen dangles the toy so that the ball swings down and then swings back up again.
Ignoring any friction, how are kinetic and potential energy related to each other as the ball swings back and forth?
As the ball moves upward, both kinetic and potential energy decrease.
As the ball moves downward, both kinetic and potential energy increase.
As the ball moves upward, kinetic energy decreases and potential energy increases.
As the ball moves downward, kinetic energy decreases and potential energy increases.
Tags
NGSS.MS-PS3-4
NGSS.MS-PS3-5
6.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
What best describes the energy in a closed system at the beginning of a day and the energy at the end of the same day? Check all that apply.
Some energy can disappear after it has caused motion.
Some energy can be changed from one form to another.
Some energy can be lost to the environment around the system.
The total initial energy will be equal to the total final energy.
Friction can cause the amount of thermal energy to increase.
Tags
NGSS.MS-PS3-4
NGSS.MS-PS3-5
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which equation represents the law of conservation of energy in a closed system?
KEi + PEi = KEf + PEf
PEi + PEf = KEi + KEf
KEi – KEf = PEi – PEf
KEi – PEf = PEi – KEf
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