Peggy has to lift an object that weighs 2,000 newtons two meters in the air using a machine that multiplies f?
Peggy has to lift an object that weighs 2,000 newtons two meters in the air using a machine that multiplies force by four times. Her input distance will be _______.
A. 2 meters
B. 4 meters
C. 6 meters
D. 8 meters
2. To have the greatest mechanical advantage, a screw should have threads that _______.
A. are widely spaced
B. are close together
C. are very small
D. are very large
3. To get a larger mechanical advantage from a lever, you should _______.
A. move the input force closer to the fulcrum
B. move the input force farther from the fulcrum
C. move the output force farther from the fulcrum
D. use less force on the lever
Peggy - work = force x distance and...
input Fd = output Fd
500 N(d) = 2000 N(2 m)
distance = 8 m
B - when close together you have to turn the screw a longer distance, but it takes less force to do it...
B - the longer the input arm, the less force you need to lift the object...Archimedes is attributed with saying "if I had a lever long enough and a fulcrum to rest it against, I could lift the world"...
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