Record your mass and spring constant in the table below. Click \"Set Trevor\" and click on \"Pull Back\" 10 times. This should set the spring to a compression of 2.0 meters. Click \"Fire Trevor\" and when you see the ice rink graphic, hover the mouse over the \"Start Timer\" button and click it when Trevor passes over the blue line to start the timer and again when he passes over the 211d blue line to stop the timer. The accuracy of your timing will affect your grade, so you might want to do several trials until you get a consistent result. Record your data below and do the calculations indicated. Data 140kg Distance traveled 18.0 In Time to travel distance d 4.00s Speed = d; 4.5mfs Kinetic Energy = gmvz 1417.5.1 Spring Constant 8'30me Spring Displacement d 2.00 m Elastic Potential Energy = ikdz EPE I If you did everything correctly, your kinetic energy ought to be about the same as the elastic potential energy in the spring