If a pulley system with an ideal mechanical advantage of 2 is used in lifting a 2,000 lb. car, how far would the car move if the effort moved 2 ft.?
Answers
Answered by
5
Answer:
1
ft
Explanation:
Since work = force x distance and assuming 100% efficiency we can write:
F
l
×
D
l
=
F
e
×
D
e
∴
F
l
F
e
×
D
l
=
D
e
Since
M
A
=
F
l
F
e
=
2
we can write:
2
×
D
l
=
D
e
=
2
∴
D
l
=
2
2
=
1
ft
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