p201f04-exam02

# p201f04-exam02 - Seat Physics P201 R Tayloe/R Heinz EXAM#2...

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1. Jennifer is standing on the edge of a cliff. She throws ball 1 straight down with an initial speed v . She throws ball 2 horizontally with the same initial speed v . She throws ball 3 at 45º above a horizontal with the same initial speed v . She throws ball 4 straight up with an initial speed v . All four balls land 12 m below the cliff edge. Neglecting air resistance, a. ball 1 lands with the greatest speed. b. ball 2 lands with the greatest speed. c. ball 3 lands with the greatest speed. d. ball 4 lands with the greatest speed. e. all balls land with the same speed. 2. A hiker ascends from a point on the Colorado River up to a point on the south rim of the Grand Canyon. During the hike, the work done by gravity on the hiker is a. negative and independent of the path taken b. equal to the work done by the normal forces c. negative and depends on the path taken d. positive and depends on the path taken e. zero 3. The force that must be exerted to drive a nail into a wall (in the x direction) is shown in the graph of the figure below . The first 1.2 cm are through soft drywall;
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p201f04-exam02 - Seat Physics P201 R Tayloe/R Heinz EXAM#2...

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