Homework Help: physics

Posted by april on Wednesday, February 4, 2009 at 5:44pm.

On his way off to college, Russell drags his bag 15.0 m from the door of his house to the car at a constant speed with a horizontal force of 95.0 N. How much work does Russell do to overcome the force of friction?

physics - bobpursley, Wednesday, February 4, 2009 at 5:47pm
work=force*distance.
The work he did is the same as work done on friction.
physics - april, Wednesday, February 4, 2009 at 5:51pm
but the answer in my book is 1430, and i got 1425
physics - Noether, Wednesday, February 4, 2009 at 6:05pm
That's probably because of significant figures. 15.0 m and 95.0 N both have three significant figures. Therefore, the answer should also have three significant figures. 1425 rounded to three sigfigs is 1430.
physics - april, Wednesday, February 4, 2009 at 6:19pm
thanks

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