Work, Power & Simple Machines Flashcards
mechanical advantage
the number of simple machines x by force
power
the rate at which work is done
efficiency
work output / work input
compound machines
combination of simple machines
output force
force exerted by axle in wheel & axle
effort force
F in
ideal machine
device in which output equals work input
simple machine
any device that accpmplishes work in one movement
input force
force applied by machine
screw
inclined plane wrapped around cylinder
fulcrum
fixed point of lever
increasing length
increases IMA of an inclined plane
work output
increases as the efficiency of a machine increases
IMA of an inclined plane 8m long & 2m high
4m
wheel & axle
2 different-sized wheels that rotate together
lever
bar that pivots about a fixed point
(blank) equals work output in an ideal machine
output work
IMA of incline plane
length of slope / height of slope
IMA of lever
length of input arm / length of output arm
IMA of fixed pulley
IMA = 1 bc the pulley ONLY changes the direction of force
IMA of block & tackle
number of rope segments used
IMA of wheel & axle
radius of wheel / radius of axle