# physics

A block weighing 8.3 N requires a force of 2.6 N to push it along at constant velocity. What is the coefficient of friction surface?
A weight W is now placed on the block and 8.2 is needed to push them both at constant velocity. What is the weight W of the block? answer in units of N.

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1. The coefficient of kinetic friction is the ratio
(force required to pull)/weight
= 2.6/8.3 = 0.313

8.2 = 0.313(8.3 + W)
26.2 = 8.3 + W
W = 17.9 N

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posted by drwls
2. A dockworker applies a constant horizontal force of 71.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 11.0 m in a time 5.40 s. What is the mass of the block of ice?

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3. uh huh

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4. use common sense bruh, put the ice on a weighing scale

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