dynamics ...

At the local skateboard park, a 50.0 kg skateboarder "drops" into a bowl. The bowl is 1.90 m deep, and its ramp makes an angle of 30.0 above the ground. Although the skateboarder bought the best wheel bearings available, there still is 100 N of resistive force as the skater travels down the 4.43 m ramp into the bowl. Calculate the speed of the skateboarder at the bottom of the bowl. m/s