PHYSICS 15A Midterm: PHYS15A Harvard Midterm2 Solutions
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Midterm exam #1, 3/16/06: a student sits atop a platform a distance h above the ground. Recracker horizontally with a speed v. however, a wind blowing parallel to the ground gives the recracker a constant horizontal acceleration with magnitude a. This results in the recracker reaching the ground directly under the student. Deter- mine the height h in terms of v, a, and g. you can ignore the e ect of air resistance on the vertical motion: consider the atwood"s machine shown below. All the strings and pulleys are mass- less, and both masses have mass m. the two strings that touch the center of the left pulley are both attached to its axle. Find the accelerations of the masses. m m. 3. (a) a pendulum of mass m and length is attached to the top of a pole of height also .
