1) A disgusted physics student wads up her homework and throws it downward into

Question

1) A disgusted physics student wads up her homework and throws it downward into a trash can.  If the wadded up paper takes 0.30 seconds to travel the 1.5 m from her hand to the bottom of the waste can, with what speed was the homework hurled? (What assumption must you make?)

2) A bungee jumping mime is attached to a bungee cord 25.0 m long. The mime is in freefall until he gets to the end of the bungee (25.0 m below starting point).  Once the bungee cord begins to stretch, the mime's speed decreases.

Assume the bungee cord causes the mime to accelerate at a constant 15.0 m/s2.

a) Find the maximum speed attained by the mime.  

b) Find how far the bungee will stretch before it brings the mime to a stop.

b) Find the distance the mime falls before coming to a stop.  (This distance could be used to decide how tall a tower to drop the mime from.)

Explanation / Answer

1) speed = 1.5/0.3= 3.33m/s

2)

a) V^-u^2=2*g*h=====> V= sqrt(2*g*h) =31.3 m/s

b) V1= V+a*t ======T = 31.3/15 = 2.08s

c) y = V1^2-V^2/(2*a)= 31.3^2/(2*15) = 32.7m

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