pM-Dle 101 SHW: Linear Momentum and Collisions Begin Date: 10/6/2017 11-39:00 PM

Question

pM-Dle 101 SHW: Linear Momentum and Collisions Begin Date: 10/6/2017 11-39:00 PM Dale! (10%) Problem 3: Suppose a child drives a bumper car head on into the side rail which exerts a force of 3950 N on the car for 045 s. Use the initial direction of the cars motion as the positive direction. 50%Part (a) What impulse, in kilogram meters per second is imparted to the car by this force? 50% Part (b) Find the horizontal components of the final velocity of the bumper car, in meters per second, if its initial velocity was 235 Q m/s and the car plus driver have a mass of 180 kg. You may neglect friction between the car and floor. Grade Summary

Explanation / Answer

a) impulse delta p = F * delta t = 3950 * 0.45

= 1777.5 N.s = 1777.5 kg.m/s

b) delta v = delta p / m = 1777.5/180 = 9.875 m/s

final velocity = 9.875 - 2.85

= 7.025 m/s

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