1)A 2 kg block rests on a horizontal plane. A force of 10 N is applied horizontally, causing the block to move at constant velocity. What is the coefficient of friction between the block and the horizontal plane? Give the answer to three significant figures.

2) What is the coefficient of friction for a ramp if the object just starts to move at an angle of 23.5 degrees? Give your answer to three significant figures.

3) Show that the coefficient of friction is dimensionless. Type your reasoning (and/or derivation)

4) list three sources of error in your hands-on experiment. Also, for each, state if the error is random or systematic

. 5) What happens to the coefficient of friction when you increase the mass of the object?

6) What happens to the frictional force when you increase the mass of the object?