Tuesday
September 2, 2014

Homework Help: science

Posted by please help(: on Wednesday, November 4, 2009 at 1:06pm.

For a machine with an efficiency of 80%, what is the work output of the machine if its work input is 2,000 joules?

would i divide 2000/.80? which gives me 2500?

Also,
If a machine requires an effort force of 750 newtons applied over a distance of 2 meters, over what resistance distance is the machine acting if the resistance force has a value of 150 newtons? Assume that it is an ideal machine. (HINT: Use the equation Fe x de = F r x dr)
A 5 meters
B 10 meters
C 150 meters
D 300 meters

can you help me set up the equation cause im lossttt! please(:

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