10. [2pt] A bungee jumper of mass m is tied to a cord of length L . She falls fr

Question

10. [2pt]
A bungee jumper of mass m is tied to a cord of length L. She falls from a bridge that is a height H above the river below. The cord stretches such that she comes to a stop when she is only at a height D above the river. What is the magnitude of the the impulse exerted on the bungee jumper while the cord stretched? Enter your symbolic answer as a function of m,H, L, D, and g, plus physical constants such as 1.0 or 0.5. As with all symbolic answers, do not ever include units or unit conversion factors. For example, you might enter:

ANSWER for 10:_______

15. [2pt]
Two small identical clay balls of mass m are suspended from the same point by strings of length L. One of them is pulled sideways and up such that its string makes an angle ? as shown. After being released from rest, it collides with the other ball, and they remain stuck together after the collision. How high h will the two balls rise after the collision? Enter your symbolic answer as a function of m, L, g, and theta (you'll have to type the whole word since you don't have a ? key on your keyboard), plus physical constants such as 1.0 or 0.5. As with all symbolic answers, do not ever include units or unit conversion factors. For example, you might enter:

bonus:

Explanation / Answer

question 10:

Mass of the person = m

gravitational force f = mg

fall of height = H-D

time of fall = SQRT(2*(H-D)/g)

impule of the force = f*t = mg * SQRT(2*(H-D)/g)

                                         = m * SQRT(2*g*(H-D))

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