14.3 - mechanical advantage (MA) Flashcards
1
Q
what is mechanical advantage?
A
the number of times that the machine increases an input force
2
Q
______________ MA < ______________ MA
A
actual MA < ideal MA
3
Q
what happens if MA is greater than 1?
A
it increases force
4
Q
MA equation
A
output force/input force
5
Q
which force is weight present in?
A
output force
6
Q
which force is the action of the person present in?
A
input force
7
Q
what is the ideal mechanical advantage?
A
the change in the input force that would be achieved if there was no friction
8
Q
IMA equation
A
input distance/output distance
9
Q
efficiency
A
the percentage % of input that BECOMES work output
10
Q
the efficiency is always ____________ than 100%
A
less
11
Q
reducing friction increases…
A
the efficiency of a machine
12
Q
work _______________ > work _______________
A
input is always more than output
