HW9-10

# HW9-10 - Oregon State University Physics 201 HW9-10 Fall...

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Oregon State University Physics 201 , Fall 2009 HW9 10 (due Dec. 4, 5:00 p.m.) Page 1 7.00 m crate Oregon State University Physics 201 Fall Term, 2009 HW9 10 This HW assignment, due December 4, covers topics mainly from 10 of the text—freely mixed together—but youʼll need the basics of gravitation, Newtonʼs Laws, and centripetal motion, too. Donʼt forget the extra credit point available. Follow the recommended format for solutions, with SI units unless directed otherwise and 3 signi± cant digits in all numerical answers. Use a separate page for each solution—donʼt crowd your solutions! 1. Chapter 10, problem 46. 2. A certain roller-coaster in California has a circular “loop-the-loop” feature with a radius of 7.00 m. It is designed so that riders are in “free-fall” for the moment when they are at the top of the loop. What speed must the roller coaster have as it enters the loop and i begins to climb? (Assume no friction in the track and ignore the slow rotation of the roller coaster.) 3. A crate starts from rest at the top of a large, frictionless spherical surface, and slides into the water below. At what angle, θ , does the crate leave the surface? 4. In attempting to pass the puck to a teammate, a hockey player gives it an initi al speed of t 2.0 m/s because , but b of the kinetic friction between the puck and ice, the puck travels only half the distance between the playe distance between the pl rs before coming to rest. Assuming that the iceʼs friction is the same everywhere, what minimum initial speed did the player need to give the puck in order for it to reach the teammate? 5.

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HW9-10 - Oregon State University Physics 201 HW9-10 Fall...

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