The kinetic energy of a 30.0 kg ball is 5.00 X 10^2 J. What is the speed of the ball?
You are allowed to ask only one question per post.
The kinetic energy of a body with a mass m kg and moving at a speed v m/s is given by K.E. = (1/2)*m*v^2 J
The kinetic energy of the ball with a mass 30 kg is 500 J. If the speed of the ball is v, from the equation for kinetic energy given earlier we get:
500 = (1/2)*30*v^2
=> 1000/30 = v^2
=> v = sqrt (100/3)
=> v = 5.774 m/s
The speed of a 30 kg ball with a kinetic energy of 500 J is 5.774 m/s