A person starts at a position of 2 meters and finishes at a position of 25 meters. The trip takes 4.5 seconds. What is the person's average velocity?

Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?