Quiz 3 & Solutions

# Quiz 3 & Solutions - NAME Physics 116 Quiz#3 TA John...

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NAME: _ Physics 116 Quiz #3 TA: John Read 20 points You have 30 minutes to complete the following problems. Please write clearly and explain your reasoning. You may define new quantities, but yow answers should be in terms of given quantities only. You must show your work to receive full credit. Problem 1 [14 points) A ball of mass m is thrown upwards through a viscous material that subjects the ball to a resistive viscous force with magnitude F, = C v (C is a constant). The ball then begins falling back towards the Earth .. (a) [2 points) Draw a diagram of the ball when it is traveling upwards and when it is traveling downwards Label the upwards direction positive in both cases and include the following in yow diagrams: (i) all forces acting on the ball, (ii) the velocity ofthe ball Upwards Travel Downwards Travel

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(b) [6 points) Now consider the ball's motion when it is falling back down toEarth. Assume that the ball starts from rest and use separation of variables to fwd the speed of the ball as a function of time
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