Skateboarder on a ramp| Physics

A skateboarder starts up a 1.0-m-high, 30° ramp at a speed of 6.9 m/s. The skateboard wheels roll without friction. At the top, she leaves the ramp and sails through the air. A) How far from the end of the ramp does the skateboarder touch down?


Angular Acceleration| Circular Motion| Physics

Your car tire is rotating at 4.0 rev/s when suddenly you press down hard on the accelerator. After traveling 300 m, the tire's rotation has increased to 6.5 rev/s . The radius of the tire is 32 cm. What was the tire's angular acceleration? Give your answer in rad/s²?

Rotation Angle and Angular Velocity| Uniform Circular Motion and Gravitation| College Physics| Openstax| Problem 6.1

Semi-trailer trucks have an odometer on one hub of a trailer wheel. The hub is weighted so that it does not rotate, but it contains gears to count the number of wheel revolutions—it then calculates the distance traveled. If the wheel has a 1.15 m diameter and goes through 200,000 rotations, how many kilometers should the odometer read?