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April 19, 2014

Homework Help: Physics

Posted by Physics on Wednesday, March 18, 2009 at 7:58pm.

A 15 N wooden block is dragged for 15 meters across a wooden floor in 15 seconds...
I'm given that the mew (the greek leter uk) or however u say it is .2

I have to make a free body diagram

I sloved and got
Fn = 15 N
mg = -15 N
Ff = -3 N

How do I solve for the force applied to get the force opposite Ff. It has to be greater than 3 N sense the block moved across the floor but how do I know the net force? I need to know the force applied which I don't know and have to solve for and don't know how to...

The quetion then asks me how much work was performed and covert to horsepower which i think I can do once I have the net force but I don't know how to get the net force without the force applied. I'm given no angle or anthing at which the force was applied either...

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