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March 30, 2015

March 30, 2015

Posted by **#!** on Wednesday, October 12, 2011 at 4:11am.

47.0 kg packing crate a distance of 6.00 m on

a rough horizontal surface.

The acceleration of gravity is 9.81 m/s2 .

If the crate moves with constant velocity,

calculate

a) the work done by the force.

Answer in units of J

b) the coefficient of kinetic friction.

- physics -
**drwls**, Wednesday, October 12, 2011 at 4:42ama) 142 x 6.00 = ___ joules

b) 142/(M*g) = 0.308

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