momenturn HW

# momenturn HW - MOMENTUM PROBLEMS Exercise 1 Auto companies...

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MOMENTUM PROBLEMS Exercise 1: Auto companies frequently test the safety of automobiles by putting them through crash tests to observe the integrity of the passenger compartment. If a 1000 kg car is sent toward a cement wall with a speed of 14 m/s and the impact brings it to a stop in 8.00 x 10- 2 s, with what average force is it brought to rest? Exercise 2: Rhonda, who has a mass of 60.0 kg, is riding at 25.0 m/s in her sports car when she must suddenly slam on the brakes to avoid hitting a dog crossing the road. She is wearing her seatbelt, which brings her body to a stop in 0.400 s. a) what average force did the seatbelt exert on her? b) If she had not been wearing her seatbelt, and the windshield had stopped her head in 1.0 x 10- 3 s, what average force would the windshield have exerted on her? c) How many times greater is the stopping force of the windshield than the seatbelt? Exercise 3: If 240 million people in the United States jumped up in the air simultaneously, pushing off the earth

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momenturn HW - MOMENTUM PROBLEMS Exercise 1 Auto companies...

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