energy and momentum

i need help with question 13.25...please

Kinetics of Particles

The bungee jumper, an 80kg man, falls from the bridge at A with the bungee cord secured to his ankles, as shown in figure 1. He falls 20m before the 17m length of the elastic bungee cord begins to stretch. The 3m of rope above the elastic cord has no appreciable stretch. The man is observed to drop a total of 44m before being projected upward. By neglecting any energy loss treating the man as a particle and taking that g=9.81m/s2 calculate: a.) The stiffness of the bungee cord b.) The maximum velocity of the man during his fall. c.) His maximum acceleration

Vibration and Time Response

Plot the response x of the 20kg body (figure 1) over the time interval 0/1 second. Determine the maximum and minimum values of x and their respective times. The initial conditions are X0=0 and dx/dt=2m/s.

FIND MASS MOMENT OF INERTIA OF THE PULLEY GIVEN ANGULAR ACCELERATION AND VELOCITY.

I CANNOT SEEM TO FIND THE ANSWER TO THIS PROBLEM ANYWHERE. I TRIED JUST SETTING IT EQUAL TO THE MOMENT ABOUT THE CENTER, BUT THAT SEEMS TO EASY. (See attached file for full problem description)

Centripetal force in centrifugal clutches and vehicle stability

Please see attatchment and help with the steps and formulas to complete questions two to five under the reference p5.