Physics II workshop_Part_22

# Physics II workshop_Part_22 - Newton's Second Law and The...

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46 Newton's Second Law and The Force Plate A force plate is essentially a digital bathroom scale that connects to the Labpro. When you stand still on the plate, it will read a value equal to your weight, mg . Suppose now that you start with bent knees, straighten the knees and jump off the force plate. (a) Draw free body diagrams for the different parts of the motion : First, standing motionless with knees bent, Second, in the early parts of straightening your legs in order to jump, Third, your legs are straight, but you have not yet left the plate Finally, after you have left the plate. Remember to draw the diagrams with (i) the object free of its surroundings, (ii) forces drawn with their tails at the center of the free object ( draw them to scale , larger forces means longer arrows!), and (iii) near the body put information about acceleration and coordinate system. (b) Predict the shape of a graph of force exerted by the force plate versus time. (c)

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## This note was uploaded on 11/26/2011 for the course PHY 2053 taught by Professor Lind during the Fall '09 term at FSU.

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Physics II workshop_Part_22 - Newton's Second Law and The...

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