Aball is thrown upward from the ground. at a helght of 10 meters above the ground, the ball has a potential energy of 50 joules (with the potential eneray equal to zero at ground level) and is moving upward with a kinetic energy of 50 joules. air friction is negligible. the maximum height above ground reached by the ball is most nearly

a. 10 m
b. 20m
c. 30 m
d. 40 m
e. 50 m

h = 20 m

Explanation:

height (h) = 10 m

potential energy (PE) = 50 J

kinetic energy (KE) = 50 J

what is the maximum height reached by the ball

         mgh = 50

         recall that height (h) = 10

          mg (10) = 50

          mg  = 5 .....equation 1

          KE + PE = 100

          + mgh = 100 J

         velocity (v) = 0 at maximum height therefore

         0 + mgh = 100

         mgh = 100

         recall that mg = 5 from equation 1, therefore

         5h = 100

         h = 20 m

increasing transnational kinetic energy. because the transnational kinetic energy formula consists of only two variables, mass and velocity, increasing one of those properties is the only way to increase an object's transnational kinetic energy. increases to mass and velocity, however, do not have the same impact.