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Unformatted text preview: Physics 7A Midterm 1 Review Problems Sunday 9/28, 122PM Jamie Hinton [email protected] Problem 1 A rock climber drops a rock o the edge of a cli of height h . He hears the sound of it hitting the ground 5 seconds later. He then climbs a second cli which he determines to have a height h = 50 m and drops another rock. He hears the sound of the second rock hitting the ground 3 . 34 seconds later. Determine the height of the rst cli h and the velocity of sound v . Problem 2 Its the seventh game of a Bay Bridge World Series between the Oakland A's and the San Francisco Giants. In the bottom of the ninth the A's are up with 2 out, Bobby Crosby on rst base, and the score tied. Jack Cust connects with a Brian Wilson fastball at a height y = 1 m above home plate at an angle of θ = 30 degrees above horizontal, and hits the ball directly over center elder Aaron Rowand's head. Rowand, who is positioned a distance D = 100 meters from homeplate, turns and runs at v AR = 9 . 5 m s at t = 0 , the moment of contact. Assuming Aaron Rowand height is h AR = 1 . 9 m, with what initial velocity v must Jack Cust hit the ball to get it over Rowand's head, plate Crosby, and win the game? 1 Problem 3 Two blocks of mass M and m are stacked on top of eachother, where M is greater than m . They are connected by a massless string over a massless...
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 Spring '08
 Lanzara
 Physics, Force, Friction, Mass, Normal Force, Cos

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