Exam2S06a

# Exam2S06a - 1 A loop-the-loop roller coaster ride has a car...

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1. A loop-the-loop roller coaster ride has a car of mass m =80 kg that starts from rest at a height of h =30 m above the ground. The car goes down to the ground (point B ), then up to the top of the loop (point T ), and finally to the midpoint ( S ). The radius of the loop is R = h /3. Neglect friction and the size of the car. a) Find the speed of the car at the bottom of the loop (point B ). 24.2 m/s b) Find the speed of the car at the top of the loop (point T ). 14.0 m/s c) Determine the magnitude of the total force on the car when it is at the top of the loop (point T ). 1570 N d) Determine the magnitude of the total force on the car when it is at midpoint ( S ) of the loop. 3230 N

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2. Fill in the blank with the most appropriate answer to the following questions. a) Three equal masses A, B, and C are on a horizontal frictionless table. The masses are connected by strings of negligible mass. If mass C is pulled horizontally by a force of magnitude F =27 N, then the tension in the string between masses B and C is T =__18 N___.
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## This note was uploaded on 05/11/2008 for the course PHY 121 taught by Professor Chamberlin during the Spring '08 term at ASU.

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Exam2S06a - 1 A loop-the-loop roller coaster ride has a car...

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