======Dropping Balls From Same Height====== **Materials: **{{$demo.materials_description}}\\ **Difficulty: **{{$demo.difficulty_description}}\\ **Safety: **{{$demo.safety_description}}\\ \\ **Categories:** {{$demo.categories}} \\ **Alternative titles:** Simultaneous Fall of Objects ====Summary==== {{$demo.summary}} ====Procedure==== -Hold a medicine ball and a softball at the same height above the floor. -Drop both balls simultaneously and observe that they hit the ground together. -Next, hold two identical balls at the same height. -Drop one ball straight down while tossing the other horizontally at the same instant. -Observe that both balls land at the same time (though it may be hard to see clearly by eye). ====Links==== Falling Balls | A Moment of Science | PBS: {{youtube>BF2Ic50m7kQ?}}\\ 📄 Physics Force - University of Minnesota: [[https://physicsforce.umn.edu/content/ball-drop]]\\ ====Variations==== * Use a timing device or video recording to measure more precisely when each ball lands. * Try dropping objects of very different masses (e.g., a basketball and a tennis ball). * Use a release mechanism to eliminate human timing error. * Perform outdoors from a greater height for a more dramatic effect. ====Safety Precautions==== * Ensure the demonstration area is clear of people and fragile objects. * Do not throw heavy balls with excessive force to avoid injury. * Use soft or rubber balls if working in a classroom setting to reduce risk. ====Questions to Consider==== * Why do the two balls hit the floor at the same time even though one is heavier? (Because gravity accelerates all objects equally, regardless of mass.) * Why doesn’t horizontal motion affect the time it takes for the ball to hit the ground? (Because horizontal and vertical motions are independent of each other.) * What forces act on the balls once released? (Only gravity acts vertically; air resistance can be ignored for simple classroom demonstrations.) * How does this experiment illustrate Galileo’s principle of falling bodies? (It shows that acceleration due to gravity is constant for all objects in free fall.)