Concepts of work kinetic energy and potential energy are discussed. Using the equation KE 05mv 2 the velocity can be determined to be 707 ms for B and E and 10 ms for H and K. Question Video Calculating The Rotational Kinetic Energy Of A Football Nagwa Work done by variable force. . F 10kgf 10 10N 100 N S 05m i Work done when. We see rotational motion examples in our daily life. Some of the examples of rotational motion are Rotation of earth about its own axis create the cycle of day and night. Calculate the work done by the force when the displacement is i in the direction of force ii at an angle of 600 with the force iii normal to the forceg 10 N kg-1. Just as the kinetic energy of an object moving in a straight line is given by this equation. The kinetic energy of a rotating body can be compared to the linear kinetic energy and described in terms of the angular velocity. The rotational kinetic energy is