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Science
Physics
Chapter 3 Lesson 1 Outline-Work and Power
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Terms in this set (21)
_________ is the transfer of energy that to an object by a force that makes an object move in the direction of the force.
force
A weight-lifter does work when exerting a force that makes weights ______, but does no work to hold weights in place because the weights are not __________.
move, moving
You must know two things to calculate work- ________ and __________.
force, distance
The force must be in ___________.
newtons
The distance must be in __________.
meters
A newton-joule is also called a _________, which is the unit of work.
joule
The work equation uses the distances that the _______ acts on the object, not necessarily the total __________ that the object moves
force, distance
The work done on an object depends on the ___________ of the force applied and the direction of the motion
direction
When the force on an object and the motion of the object are in the same direction, you multiply the total ________ times the distance to determine the amount of work done.
force
When the force on an object is at a ________, to the direction of motion of the object, you multiply only the part of the force that is in the __________ of motion times the total distance to determine the amount of work done.
angle, direction
The weight of any object is due to the downward force of _________ on the object
gravity
To lift an object, you must pull upward of the object with a force _______ to the object's weight.
equal
The work done to lift any object is equal to the _________ of the object multiplied by the distance the object is lifted
weight
Doing work on an object increases transfers _________ to the object
energy
Because doing work on an object requires that the object move, doing work on the object increases its ________ energy
kinetic
Lifting an object increases the object's gravitational __________ energy.
potential
________ is the rate at which work is done.
power
Power is determined by dividing the work done by the amount of ________ needed to do the work
time
In the power equation, ________ done is in joules
work
In the power equation, _______ is in seconds
time
In the power equation, power is in __________.
walts
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