Physics Lab 1 - Jon Crowely Physics Lab 1: Weightlifting...

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Jon Crowely Physics Lab 1: Weightlifting Section 1: Data Collection The weightlifting lab consisted of three different measures of force in regards to weight. The goal in this lab was to find the force needed in the arms to hold the weight overhead, lift the weight, and hold the weight at waist level. Initially our group made estimations about the force in each arm and the angles of the arms. From these estimations we then drew a free-bodied diagram (FBD) of the weightlifter shown below and labeled it with variables. After setting up the FBD, we then had to find the weight of the barbell using the equation W=mg. In this equation W is the weight in Newton’s (N), m is the mass of the barbell in kg and g is the gravitational field strength which is about 9.81 N/kg. Our estimation of the angles of the arms was 21 degree’s. Now, knowing the angles at which the force was being directed and the weight of the barbell, we can write expressions for each of the force vectors. Then is the simple matter of putting values into the equations to solve for the vectors. The expressions and equations are shown below.
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This note was uploaded on 04/12/2008 for the course PHYS 210 taught by Professor Marshland during the Spring '08 term at Northern Illinois University.

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Physics Lab 1 - Jon Crowely Physics Lab 1: Weightlifting...

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