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