A hoist for pulling engines out of cars consists of a large metal box with two chains hanging down from it.
You can't see inside the box, so you have no idea what is in there. However, you notice that when you
pull one chain down by two meters, the other chain goes up by one tenth of a meter. If the maximum force that you can exert on one of these chains is 1000N, what is the maximum weight that you could possibly lift with this hoist?
(A) 1000N.
(B) 2000N.
(C) 10,000N.
(D) 20,000N.
(E) There is no way to tell.
A hoist for pulling engines out of cars consists of a large metal box with two chains hanging down from it.
You can't see inside the box, so you have no idea what is in there. However, you notice that when you
pull one chain down by two meters, the other chain goes up by one tenth of a meter. If the maximum force that you can exert on one of these chains is 1000N, what is the maximum weight that you could possibly lift with this hoist?
(A) 1000N. --- No.
That is just the input force.
A hoist for pulling engines out of cars consists of a large metal box with two chains hanging down from it.
You can't see inside the box, so you have no idea what is in there. However, you notice that when you
pull one chain down by two meters, the other chain goes up by one tenth of a meter. If the maximum force that you can exert on one of these chains is 1000N, what is the maximum weight that you could possibly lift with this hoist?
(B) 2000N. --- No.
The output distance is only 0.1m.
The distance ratio is much bigger than two.
A hoist for pulling engines out of cars consists of a large metal box with two chains hanging down from it.
You can't see inside the box, so you have no idea what is in there. However, you notice that when you
pull one chain down by two meters, the other chain goes up by one tenth of a meter. If the maximum force that you can exert on one of these chains is 1000N, what is the maximum weight that you could possibly lift with this hoist?
(C) 10,000N. --- No.
The input distance is 2m. Calculate the ratio.
A hoist for pulling engines out of cars consists of a large metal box with two chains hanging down from it.
You can't see inside the box, so you have no idea what is in there. However, you notice that when you
pull one chain down by two meters, the other chain goes up by one tenth of a meter. If the maximum force that you can exert on one of these chains is 1000N, what is the maximum weight that you could possibly lift with this hoist?
(D) 20,000N. --- Yes.
2/(0.1) = 20, so the force is multiplied by a factor of 20.
A hoist for pulling engines out of cars consists of a large metal box with two chains hanging down from it.
You can't see inside the box, so you have no idea what is in there. However, you notice that when you
pull one chain down by two meters, the other chain goes up by one tenth of a meter. If the maximum force that you can exert on one of these chains is 1000N, what is the maximum weight that you could possibly lift with this hoist?
(E) There is no way to tell. --- No.
Energy conservation gives you a way to tell.
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