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23 Terms
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1
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Mechanical work
the amount of mechanical energy transferred to an object by a force
2
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Mechanical energy
the energy of an object that is part of its total energy that can change by mechanical work
3
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Magnitude
the amount of work depends on the __________ of the force
4
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Displacement
The amount of work depends on the _____________ of the object
5
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Nxm
1J is equal to
6
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positive
if there is an applied force, it will do ___________ work on the object and total mechanical energy
7
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Negative
if there is a frictional force opposing motion, it will do __________ work on the object and total mechanical energy
8
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0
when a force exists, but an object does not move, W = ___
9
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0
When an object is in uniform motion but does not require a force to keep it in motion, W = ___
10
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0
When a force acting on an object is perpendicular to the direction of motion, W =___
11
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Energy
The ability to do work
12
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Mechanical energy
Kinetic energy + potential energy within a system = _________________
13
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4
If Velocity doubles, what factor does kinetic energy increases by? (number)
14
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2
Same speed, but one object has twice the mass of the other, what is the kinetic energy of the larger car compared to the smaller car? (number)
15
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Work-kinetic energy theorem
what theorem is shown with: Fnet = ma
16
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Potential energy
energy that is stored in an object due to its position or condition
17
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Gravitational energy
energy stored in an object due to its distance above the surface of Earth
18
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Gravitational
when work is done against the force of gravity it is stored as __________________ energy
19
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Decrease
as an object is falling a height, the gravitational potential energy will _______________.
20
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conservation of energy
what law is said that energy is neither created nor destroyed but may be transferred or converted into another form
21
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Conservative force
force that includes gravity, magnetic, electrical, elastic, and nuclear forces
Energy changes that are reversible
22
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Non-conservative force
force that includes friction, air resistance, drag, rocket thrust
Energy changes are not reversible or lost and converted
23
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