Physics Final Exam Review1

# Physics Final Exam Review1 - You throw a basketball toward...

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1 You throw a basketball toward a hoop, and it travels in an arc through the air. Ignoring any forces that air exerts on the ball, the net force on the ball just after it leaves your hands is 1. down and away from you. 2. straight down. 3. zero. 4. up and away from you 1 You stamp your feet and clean the snow off your boots. This can be explained based on 1. conservation of angular momentum 2. conservation of energy 3. inertia 4. gravity 2 After clearing the bar in the high jump, you land softly on a giant mattress. Landing on the mattress is much more comfortable than landing on a sand heap of equal size because 1. you transfer less momentum to the mattress in coming to a stop than you would have transferred to the sand heap in coming to a stop. 2. the force that the mattress exerts on you to stop your descent is much less than the force that the sand heap would have exerted on you. 3. you transfer more momentum to the mattress in coming to a stop than you would have transferred to the sand heap in coming to a stop. 4. your velocity is less as you land on the mattress than it would have been if you'd landed on the sand heap. 3 You and a friend are having a tug-of-war. You win. In doing so, you do 1. negative work on the rope and so does your friend. 2. positive work on the rope and your friend does negative work on the rope. 3. negative work on the rope and your friend does positive work on the rope.

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