two students move a box to the left one student pushes with a force of 100 to the left, and the other student pulls with a force of 85 and to the left. they move the box 20 M and 7s. what is the total amount of work done on the box by the students? PLEASE ANSWER RIGHT AWAY IM GIVING 50 PTS

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?

The two required components for a generator are

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.