lab report 5

lab report 5 - John Brewer Lilly Friction PHY 241 LAB...

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John Brewer Lilly Friction PHY 241 LAB February 19, 2008
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Purpose: The purpose of this experiment was to add the variable friction into the Atwood machine. With friction added we will be able to calculate the work done by the friction. The accelerating load will be increased and we will learn how the power will be affected by the frictional force. Materials: Photo gate Timer Ramp Ramp incline Block with string Pulley wheel Weights Procedure: Exercise 1 The coefficient of static friction is calculated by placing the wood block on the track and lifting the track until the block is just about to slide down the track. This is theta critical the angle at which the block will slip if the angle is increased. The coefficient of kinetic friction is calculated by tilting the track to an angle that the block will slide down without any acceleration. By taking the inverse tangent of theses angles the coefficients were found. The Atwood machine was constructed at a certain angle and
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lab report 5 - John Brewer Lilly Friction PHY 241 LAB...

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