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161hw3

# 161hw3 - goes up in the second one without losing any speed...

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Homework 3: Phys.161 Spring, 2008 Due 02/22/08 Dr. R. N. Mohapatra These problems are in addition to the web assigned ones and only one out of four will be graded. and total points for the written assignment below is 4. Total points together with the web assigned ones is 10 for this and all other homeworks. Problem 1: There are two inclined planes joined at the bottom by a smooth surface (See figure drawn in the board in the class Friday). The left one is inclined at 30 0 above the horizontal and the right one at 60 0 above the right horizontal. There is no friction force on either surface. A child slides down starting from rest at a height of 1.0 meter above the horizontal in the left incline and after reaching the bottom
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Unformatted text preview: goes up in the second one without losing any speed at the bottom joint. Using the kinematic equations discussed in class, calculate how high will she rise in the right incline. Draw the y-t , v y-t graph for the child. Problem 2: A car is approaching a hill at 30.0 m/s when its engine suddenly fails, just at the bottom of the hill. The car moves with a constant acceleration of -2.0m/s 2 while coasting up the hill. (a) Write equations for the position along the slope and for the velocity as a function of time, taking x = 0 at the bottom of the hill where v i = 30 . 0 m/s. (b) Determine the maximum distance the car travels up the hill. Two other problems from book: Ch. 3: 3.32, 3.39;...
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