Activity15MomentumMar11

# Activity15MomentumMar11 - Activity 15: Momentum and...

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Activity 15: Momentum and Collisions March 11, 2008 A soccer ball with mass 0.420 kg is traveling with a speed of 4.50 m/s at an angle of 20.0 counterclockwise from the +x-axis. a. what is the ball's x- and y-components of momentum? Energy Change During a Hip Check. Ice-hockey star Wayne Gretzky is skating at 13.0 m/s toward a defender, who in turn is skating at 5.0 m/s toward Gretzky. Gretzky's weight is 756 N; that of the defender is 900 N. Immediately after the collision, Gretzky is moving at 1.5 m/s in his original direction. You can ignore external horizontal forces applied by the ice to the skaters during the collision. a. What is the velocity of the defender immediately after the collision? b. Calculate the change in the combined kinetic energy of the two players.

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Unformatted text preview: Activity 15: Momentum and Collisions March 11, 2008 At the intersection of Main Street and Rte 322, a yellow, subcompact car with mass 950 kg traveling east on Rte 322 collides with a maroon pickup truck with mass 1900 kg that is traveling north on Main and ran a red light. The two vehicles stick together as a result of the collision and, after the collision, the wreckage is sliding at 16.0 m/s in the direction east of north (24 as shown). The collision occurs during a heavy rainstorm; you can ignore friction forces between the vehicles and the wet road. a. Calculate the speed of the car before the collision. b. Calculate the speed of the truck before the collision....
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## This test prep was uploaded on 04/08/2008 for the course PHYS 20910 taught by Professor Magee-sauer during the Spring '08 term at Rowan.

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Activity15MomentumMar11 - Activity 15: Momentum and...

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