Physics Home Help

Anonymous
timer Asked: Nov 7th, 2016

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very hard

1. A 2.75 kg steel ball strikes a wall with a speed of 10.0 m/s at an angle of 60.0° with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.235 s, what is the average force exerted on the ball by the wall? x-component N y-component N 2. A 70.0 kg person throws a 0.0400 kg snowball forward with a ground speed of 27.0 m/s. A second person, with a mass of 57.0 kg, catches the snowball. Both people are on skates. The first person is initially moving forward with a speed of 2.30 m/s, and the second person is initially at rest. What are the velocities of the two people after the snowball is exchanged? Disregard the friction between the skates and the ice. thrower catcher 3. A 75.0 kg ice skater moving at 9.50 m/s crashes into a stationary skater of equal mass. After the collision, the two skaters move as a unit at 4.75 m/s. If the impact time is 0.120 s, what are the magnitudes of the average forces experienced by each skater during the collision? Force experienced by moving skater 4. Two automobiles of equal mass approach an intersection. One vehicle is traveling with velocity 14.0 m/s toward the east and the other is traveling north with speed v2i. Neither driver sees the other. The vehicles collide in the intersection and stick together, leaving parallel skid marks at an angle of 57.5° north of east. What was the initial speed of the northward-moving vehicle?

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