PHSX 114 - HW #5 Solutions

# PHSX 114 - HW #5 Solutions - Homework Assignment 5...

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Homework Assignment 5 – Solutions 18. Choose downward to be the positive y direction. The origin will be at the point where the diver dives from the cliff. In the horizontal direction, 0 1.8m s x v = and 0 x a = . In the vertical direction, 0 0 y v = , 2 9.80 m s y a = , 0 0 y = , and the time of flight is 3.0 s t = . The height of the cliff is found from applying Eq. 2-11b to the vertical motion. ( 29 ( 29 2 2 2 1 1 0 0 2 2 0 0 9.80 m s 3.0s 44 m y y y y v t a t y = + + = + + = The distance from the base of the cliff to where the diver hits the water is found from the horizontal motion at constant velocity: ( 29 ( 29 1.8m s 3 s 5.4 m x x v t ∆ = = = 23. Choose downward to be the positive y direction. The origin is the point where the ball is thrown from the roof of the building. In the vertical direction, 0 0 y v = , 0 0 y = , and 2 9.80 m s y a = . The initial horizontal velocity is 22.2 m/s and the horizontal range is 36.0 m. The time of flight is found from the horizontal motion at constant velocity. 36.0 m 22.2 m s

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## This note was uploaded on 04/09/2008 for the course PHSX 114 taught by Professor Davis during the Spring '08 term at Kansas.

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PHSX 114 - HW #5 Solutions - Homework Assignment 5...

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