Monday

January 26, 2015

January 26, 2015

Posted by **janie** on Saturday, February 13, 2010 at 7:23am.

(a) Find the mass of the box. kg

(b) Find the coefficient of kinetic friction between the box and the floor.

- physics -
**bobpursley**, Saturday, February 13, 2010 at 8:15amNet force= m*a

75-friction=m*.55

85-friction=m*.78

subtract the first equation from the second

10=m(.23)

m= 10/.23

then solve for friction in either equation, finally, mu=frictionforce/mg

- physics -
**janie**, Saturday, February 13, 2010 at 8:35amthank you

**Answer this Question**

**Related Questions**

Physics - You push a box along the floor against a constant force of friction. ...

Physics - You push a box along the floor against a constant force of friction. ...

physics - box full of books rests on a wooden floor. The normal force the floor...

physics - Mary applies a force of 77 N to push a box with an acceleration of 0....

Physics - A box of mass m1 = 10.0 kg rests on a smooth, horizontal floor next to...

HELP PHYSICS!!!! - a worker pushes a 7kg shipping box along a roller track. ...

Physics - A 50kg box is sitting on your front porch. The coefficient of sliding ...

Science-Physics - You push a 67 kg box across a floor where the coefficient of ...

mechanics - A 2kg box sits at rest on a level floor. Two children push on the ...

physics multiple choice - A force F is required to push a crate along a rough ...