You are testing a new car using crash test dummies. Consider two ways to slow th

Question

You are testing a new car using crash test dummies. Consider two ways to slow the car from 90 km/h (56 mi/h) to a complete stop: (i) You let the car slam into a wall, bringing it to a sudden stop. (ii) You let the car plow into a giant tub of gelatin so that it comes to a gradual halt. In which case is there a greater impulse of the net force on the car? A. In case (i). B. In case (ii). C. The impulse is the same in both cases. D. The answer depends on how rigid the front of the car is. E. The answer depends on how rigid the front of the car is and on the mass of the car.

Explanation / Answer

We know

Impulse=change in momentum

Impulse=force*time

Since time will be less for wall so force will be more for wall bi but impulse will be same for both case so impulse will be same as change in momentum is same for both case

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