07:17AP Physics 1: Work and Energy 10: Conservation of Energy: Projectile ProblemYau-Jong Twu638views
Multiple ChoiceYou are practicing jumping as far as you can. In one attempt, you run and leave the floor with 7 m/s directed at an unknown angle. What maximum height do you reach if your speed at that point is 5 m/s? Ignore air resistance.761views17rank1comments
Multiple ChoiceA toy gun is mounted on a tabletop. It shoots a small plastic ball at 6.0m/s. The ball leaves the toy gun at an angle of 24° above the horizontal, and a height of 83cm above the ground. How fast is the ball travelling when it hits the ground? Use energy concepts.392views
Multiple ChoiceCalvin uses a catapult to launch a foam football at Susie. If the ball leaves the catapult at a height of 2.0m and is moving at 15m/s when it strikes the ground (he missed), how fast was the football moving when it left the catapult? Ignore air resistance.344views
Multiple ChoiceA spring-loaded toy gun shoots a 3.0g plastic ball straight up into the air. From the position of the ball when the gun is cocked, with the spring compressed, to the maximum height the ball reaches, is 2.5m. If the spring was compressed 2.0cm, what is the spring constant of the spring? Ignore air resistance.480views
Textbook QuestionA film of Jesse Owens’s famous long jump (Fig. 8–48) in the 1936 Olympics shows that his center of mass rose 1.1 m from launch point to the top of the arc. What minimum speed did he need at launch if he was traveling at 6.5 m/s at the top of the arc?<IMAGE>191views
Textbook Question(III) Early test flights for the space shuttle used a “glider” (mass of 980 kg including pilot). After a horizontal launch at 480 km/h at a height of 3200 m, the glider eventually landed at sea level with a speed of 210 km/h.(a) What would its landing speed have been in the absence of air resistance?213views
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