9th_PH_5_3_I2_Pulleys, Conservation of Mechanical Energy, Power and Th
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Created on May 7, 2023
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Transcript
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Pulleys, Conservation of Mechanical Energy, Power and Thermal Energy
PART II
The output force is greater
The output force is less
1/10
How does the input force compare to the output force for a fixed pulley?
1/10
They are the same
WELL DONE
next
1/10
Each side supports 1/2 of the weight
Each side supports 2x the weight
It depends on the weight of the object
2/10
2/10
In a moveable pulley, how is the object's weight distributed through the rope?
WELL DONE
NEXT
2/10
The input distance is increased
The input work is increased
3/10
The input work is decreased
3/10
How is it possible to have less input force but more output force?
WELL DONE
NEXT
3/10
Work
4/10
Magnifies the force
Lifts an object
4/10
What does a moveable pulley do that a fixed pulley does not?
WELL DONE
NEXT
4/10
5/10
Energy can be created but not destroyed
Energy cannot change forms
Energy can be neither created nor destroyed
5/10
What does the law of conservation of energy state?
WELL DONE
NEXT
5/10
The creation of thermal energy in an object or system.
The transfer of thermal energy from one object or system to another.
6/10
What is heat?
6/10
The destruction of thermal energy in an object or system.
WELL DONE
NEXT
6/10
Energy from a natural resource that can be replenished.
7/10
7/10
Any form of energy that can be recycled.
Energy from the movement of an object.
Which of the following is the best definition of renewable energy?
WELL DONE
NEXT
7/10
The Earth's core.
8/10
The Earth's deserts.
The Earth's crust.
8/10
Most of the Earth's geothermal energy is contained within:
8/10
NEXT
8/10
The surface of the Earth would heat up
9/11
The surface of the Earth would cool
The surface of the Earth would break apart
9/11
What would happen if geothermal energy ceased to exist?
9/11
NEXT
9/11
The ability to do work
The movement of particles within a system
The temperature of a substance
10/11
Energy can best be defined as:
10/11
10/11
NEXT
10/11
Chemical bonds
The number of particles in a system.
The movement of particles
11/11
What makes thermal energy possible?
11/11
PLAY AGAIN
EXCELLENT JOB!
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Oh, oh...
Incorrect!