Question

Assume you want to slow down a 2700-lb car in a safe way, that is, you want the first barrel to slowdown the car by 10 mph from its original speed which is 60+ your birth month (so if you are born in May, speed 65 mph). 1. What is the speed of the car before impact? 2. Assume elastic collision. How many pounds does the barrel need to weigh to slow down the car by 10 mph? Give the velocity of the car before and after impact? Also, what is the velocity of the barrel after impact? ZCHLV)-constant 1e0 9 bs Answer: The barrel will need to weigh .. mph The barrel will 'shoot away' at 3. Assume plastic collision. How many pounds does the barrel need to weigh to slow down the car by 10 mph? Give the velocity of the car before and after impact? ZIM)LV)-Constans

Answer 1

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november birth month ) Tf the 's 60+ 7 mph of the velocity Initial Car = 2100 Lb weight of the initial caY of initial barrel velocty lomphV6lmph Grven that of reduced by speed car dimen siona the Collision as one + 7161 32 mph For Gr collision elastic m,u,+ 200 (61) o0) m2 C13 2) m2 (o) 2700 lo m2 204.5 of Final velocty Ca plastic/ ne lastic For collisibn M,u m22 2700) ( mCo) - (2700+m) (61) 2700m 31y2.6229 442.6229 b