simple machines Flashcards
1
Q
work
A
when force is exerted on an object and the object moves
2
Q
power
A
rate at which work is done
3
Q
joule
A
work= force x distance, unit that describes work
4
Q
watt
A
power is described in watts
5
Q
machine
A
a device that makes work easier and more efficient
6
Q
input force
A
energy put in a machine
7
Q
output force
A
work that the machine produces
8
Q
mechanical advantage
A
the number of times a machine multiplies the input force
9
Q
mechanical efficiency
A
mechanical advantage x 100%
10
Q
lever
A
rigid bar that rotates on a fixed point
11
Q
pulley
A
a grooved wheel with a rope attached
12
Q
wheel and axel
A
two circular objects that rotate together
13
Q
inclined plane
A
ramp,straight, slanted surface- MA= length of ramp/height if ramp
14
Q
wedge
A
small ramp- inclined plane, axe, zipper teeth
15
Q
screw
A
an inclined plane wrapped around a cylinder
