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Physics

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23 Terms

1
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Mechanical work

the amount of mechanical energy transferred to an object by a force

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Mechanical energy

the energy of an object that is part of its total energy that can change by mechanical work

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Magnitude

the amount of work depends on the __ of the force

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Displacement

The amount of work depends on the _ of the object

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Nxm

1J is equal to

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positive

if there is an applied force, it will do ___ work on the object and total mechanical energy

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Negative

if there is a frictional force opposing motion, it will do __ work on the object and total mechanical energy

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0

when a force exists, but an object does not move, W = ___

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0

When an object is in uniform motion but does not require a force to keep it in motion, W = ___

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0

When a force acting on an object is perpendicular to the direction of motion, W =___

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Energy

The ability to do work

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Mechanical energy

Kinetic energy + potential energy within a system = ___

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4

If Velocity doubles, what factor does kinetic energy increases by? (number)

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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)

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Work-kinetic energy theorem

what theorem is shown with: Fnet = ma

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Potential energy

energy that is stored in an object due to its position or condition

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Gravitational energy

energy stored in an object due to its distance above the surface of Earth

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Gravitational

when work is done against the force of gravity it is stored as ____ energy

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Decrease

as an object is falling a height, the gravitational potential energy will _.

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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

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Conservative force

force that includes gravity, magnetic, electrical, elastic, and nuclear forces

Energy changes that are reversible

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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

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