A 1.0 lbm piece of foam accelerates at 100 g’s for 0.25 seconds. (Use g = 32 ft/s^2). a) How fast is it going in fps (feet per second) (partial answer = 800 fps) and in mph (miles per hour)? b) It has some amount of kinetic energy. But we don’t relate intuitively to kinetic energy. To relate this amount of energy to more understandable terms, how heavy would an object the same size as that piece of foam have to be to have the same energy as the piece of foam when dropped from 1.00 ft? i. First calculate how fast this object would be going if you dropped it from 1.00 ft. (Hint: How long does something dropped from 1 foot take to hit the ground?) ii. Now simply solve for the equivalent mass using the kinetic energy equation. (KE1 = KE2, where KE = ½ m v2). c) Would this concern you if it hit something? Why?

A 1.0 lbm piece of foam accelerates at 100 g’s for 0.25 seconds. (Use g = 32 ft/s^2). a) How fast is it going in fps (feet per second) (partial answer = 800 fps) and in mph (miles per hour)? b) It has some amount of kinetic energy. But we don’t relate intuitively to kinetic energy. To relate this amount of energy to more understandable terms, how heavy would an object the same size as that piece of foam have to be to have the same energy as the piece of foam when dropped from 1.00 ft? i. First calculate how fast this object would be going if you dropped it from 1.00 ft. (Hint: How long does something dropped from 1 foot take to hit the ground?) ii. Now simply solve for the equivalent mass using the kinetic energy equation. (KE1 = KE2, where KE = ½ m v2). c) Would this concern you if it hit something? Why?