A cannon of mass 500 kg is loaded with a cannon ball of mass 1 kg. The cannon and ball are both stationary when the ball is fired at a velocity of 50 m/s. The cannon recoils when the
gun is fired. What is the absolute value of the recoil velocity of the cannon?

The desk has a weight of 75 lb and a center of gravity at g. determine the initial acceleration of a desk when the man applies enough force f to overcome the static friction at a and b. also, find the vertical reactions on each of the two legs at a and at b. the coefficients of static and kinetic friction at a and b are ms = 0.5 and mk = 0.2, respectively

An object moves from the position +34m to the position -15m in 15 seconds. what is it's total displacement? what is it's average velocity?

At the negative terminal of the battery the electron has electric potential energy. what happens to this energy as the electron jumps from the negative to the positive terminal?