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Unformatted text preview: CH.9 A 60g tennis ball with an initial speed of 32m/s hits a wall and rebounds with the same speed. The figure shows the force of the wall on the ball during the collision. What is the value of Fmax, the maximum value of the contact force during the collision? Far in space, where gravity is negligible, a 425kg rocket traveling at 75.0 m/s fires its engines. The figure shows the thrust force as a function of time. The mass lost by the rocket during these 30 s is negligible. a)Impulse is: b) At what time does the rocket reach its maximum speed? What is the maximum speed of the rocket? A 200g ball is dropped from a height of 2.0m , bounces on a hard floor, and rebounds to a height of 1.5m . The figure shows the impulse received from the floor. What maximum force does the floor exert on the ball? The force exerted by floor on ball found using impulse-momentum. Three identical train cars, coupled together, are rolling east at 2.0m/s. A fourth car traveling east at 4.0m/s catches up with the three andThree identical train cars, coupled together, are rolling east at 2....
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This note was uploaded on 05/12/2010 for the course PHYSICS 20 taught by Professor Yigu during the Spring '10 term at Washington State University .
- Spring '10