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April 16, 2014

Homework Help: physics

Posted by jaslyen on Sunday, November 6, 2011 at 7:26pm.

A mover pushes a couch a distance of 4 m to the top of a ramp into the back of a truck using 500 N of force.
A) What is the work input of the mover?
B) What is the moverís power if the task takes 10s?
C) If the mass of the couch is 100 kg and the back of the truck is 1.5 m high, what is the work output of the ramp?
D) What is the efficiency of the ramp?
E) What is the mechanical advantage of the ramp?
F) What is the ideal mechanical advantage of the ramp?

My answer please check if i am correct
A.2000 J
B. 200 W
C. 1470 J
D. 34 %
E. 2.94
F. 2.66

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