Work = force * distance.
We must produce twice as much energy as we are lifting the weight twice as high.
But we are not increasing the force so we must increase the length of the ramp ( distance ) instead.
The new length will be twice as great as the previous length.
So 8 metres is required.
25 kg * 8 m = work = 100 kg * 2 m
A. The English system uses one unit for each category of measurement.
Answer:
Is it a sin to like them all...? haha
I cannot see all the questions, what is 18,19 and 21? (:
