Ballistics Car with Remote Trigger, demonstrates the independence of vertical and horizontal motions. It consists of a four-wheeled cart carrying a vertical tube with a spring-loaded piston inside. The tube is loaded with a ball and the cart is set in motion
Go Wireless* Exercise Heart Rate, Recommended for College, High School, and Middle School Science, excellent hands-free option for continuously monitoring heart rate before, during, and after exercise or while a person is stationary