Alight, inextensible cord passes over a light, frictionless pulley with a radius of 8.9 cm. it has a 19 kg mass on the left and a 2.6 kg mass on the right, both hanging freely. initially their center of masses are a vertical distance 3.8 m apart. the acceleration due to gravity is 9.8 m/s^2. at what rate are the two masses accelerating when they pass each other? answer in units of m/s^2. what is the tension in the cord when they pass each other? answer in units of n.

Aball is thrown from the top of a building with an initial velocity of 21.9 m/s straight upward, at an initial height of 51.6 m above the ground. the ball just misses the edge of the roof on its way down, as shown in the figure. (a) determine the time needed for the ball to reach its maximum height. (b) determine the maximum height. (c) determine the time needed for the ball to return to the height from which it was thrown, and the velocity of the ball at that instant. (d) determine the time needed for the ball to reach the ground. (e) determine the velocity and position of the ball at t = 5.35 s.