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Physical Science
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27
Science
9th Grade
05/11/2009

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Cards

Term
quantity that measures how much a machine multiplies input force to overcome output force
Definition
mechanical advantage
Term
equation for MA - force
Definition
output/input
Term
equation for MA - distance
Definition
input/output
Term
slanted surface used to raise an object; multiplies distance you can move
Definition
inclined plane
Term
an inclined that moves as two inclined planes together
Definition
wedge
Term
an inclined plane wrapped around a central bar, or cylindar, to form a spiral
Definition
screw
Term
a rigid bar free to pivot, or move about, a fixed point
Definition
lever
Term
fixed point on a simple machine
Definition
fulcrum
Term
fulcrum is located between input & output forces
Definition
1st class lever
Term
fulcrum is on one end of the arm and the input force is applied to the other end
Definition
2nd class lever
Term
mechanical advantage of less than 1; least efficient; human body contains these
Definition
3rd class levers
Term
a modified lever; has a grooved wheel with a rope or chain running along the groove; point in the middle is fulcrum
Definition
pulley
Term
like 1st class levers, always have MA of 1
Definition
single fixed pulley
Term
mechanical advantage greater than 1; less force needed with more ropes
Definition
single moveable pulley
Term
occurs when two wheels of different sizes rotate together; input force is applied to the larger wheel while the output force is the axle
Definition
wheel & axle
Term
when a force causes a change in the position or the motion of an object in the direction of the applied force
Definition
work
Term
formula for work
Definition
w=fxd
Term
the rate at which work is done or energy is transferred
Definition
power
Term
capacity of a system to do work
Definition
energy
Term
energy stored in an object
Definition
potential energy
Term
formula for PE
Definition
mass x gravity x height
Term
energy of a moving object due to the object's motion
Definition
kinetic energy
Term
formula for KE
Definition
1/2 x mass x speed squared
Term
freezing & boiling point for fahrenheit
Definition
freezing: 32 boiling: 212
Term
freezing & boiling point for celcius
Definition
freezing: 0 boiling: 100
Term
fahrenheit --> celsius
Definition
(F-32) / 1.8
Term
Celsius --> fahrenheit
Definition
1.8 x C + 32
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