A tennis ball is struck and departs from the racket of Prof. Jacome horizontally with a speed of 30 m/s. The ball hits the court at a horizontal distance of 20 m from the racket. How far above the court is the tennis ball when it leaves the racket?
A 10 kg particle has a speed of 3.0 m/s at point A and a KE of 20 J at point B, what is, (a) it's kinetic energy at A? (b) Its speed at point B? (c) The total work done on the particle as it moves from A to B?
A New York Firefighter is trying to rescue a man trapped in a fire. The man has a mass of 150 kg and is lowered to the ground from an upper story window with a rope where the tension is kept constant at 500 N. Calculate the acceleration of the man during this descent.
A 100 kg crate rests on a level floor at a docking station. The coefficient of static friction is 0.944. What is the horizontal pushing force required just to start the crate moving? If you were given the maximum frictional force to be 500 N, solve for the coefficient.