Newton's Cradle
Stop the Animation and then Reset it if you want to change the initial angle.
Newton's Cradle
Inclined Plane with Two Masses and a Pulley
Use the sliders to adjust the angle of the incline, and the two masses. Hit the "Run" button to watch the objects accelerate. Click the checkbox to show numerical values for acceleration, tension in the string, velocity, time, and the change in height of m1.