Homework #4 Drop/Deceleration Force Calculations Name: Given that the statistical data for falls occurring in construction show that approximately 50% of all workers that fall from height to a lower surface at or above eleven (11) feet are killed, let's see what kind of forces (F) in pounds is generated at impact. We will also need to calculate the velocity in feet/second and miles/hour of the falling body. For purposes of this exercise, we will use a body weight of 225 pounds. TWO criteria for deceleration will be: a) allowing the lanyard deceleration device to deploy after six (6) feet of fall and decelerate the fall in 14 inches and b) striking a concrete surface after ten (10) feet of fall where a deceleration distance of three (3) inches resulted from the compression of the body. Answer the following questions using our statics or physics expertise related to principles for bodies in motion (equations are below). Use back of sheet if more space is needed. 1 2 2mgh h: g 2mv m =V2 2gh=v2 = V: 29h 1) What is the maximum velocity of the falling body from six (6) feet? (2) a) ft./sec b) mph