A boulder is sitting at the top of a hill that is 30 m high. The boulder has a mass of 100 kg. Calculate the gravitational potential energy. (SHOW ALL WORK)

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.

Talia is manufacturing rolls of wire for hanging pictures. she needs a material that is so that it can easily be pulled into wire without breaking.