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Work and Kinetic Energy 
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#1
Mar205, 05:31 PM

P: 142

First, let us consider a sled of mass m being pulled by a constant, horizontal force of magnitude F along a rough, horizontal surface. The sled is speeding up.
how many major forces are acting on the sled? would it be 4 forces? gravity, normal, tension and kinetic? 


#2
Mar205, 05:34 PM

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P: 11,894

Yes,there are 4 forces acting on the sled.That 'kinetic' hopefully stands for 'kinetic friction force'...What tension...?There's the force that pulls the sled,F,there's no tension.
Daniel. 


#3
Mar205, 06:00 PM

P: 788

Gravity  yes. Kinetic (friction force)  yes. No tension.. well none that's really on the sled. Normal force  yes. And finally, the horizontal force. You get a nice diagram of 4 forces all on every side of the sled.



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