How Hard Can You Hit a Golf Ball? (at 100,000 FPS) - Smarter Every Day 216
Why Physics Stack Exchange recommends it
Physics Stack Exchange users link it as a real high-speed example of a ball deforming in a collision and of a vacuum tube launching a projectile.
Recommended by 1 people across 1 different months, 2019 to 2023.
What it is
Destin Sandlin of Smarter Every Day fires a golf ball from a pressurized vacuum cannon at over 500 mph and films the impact at 100,000 frames per second. The video shows how the ball compresses, deforms and sometimes breaks on a hard target, and it includes a guest segment tied to Mark Rober's rocket golf club.
What people said
Recommends mmesser314 · 2023-06 · Physics Stack Exchange · on “Velocity at impact”
Typically a ball is idealized as a point particle or rigid object. A collision is idealized as instantaneous. The idealizations work for problems where you ask about velocity before and after. But they fail when you ask about what goes on during a collision. Forces are reasonably small before a collision, typically $1$ g. A ball can stay reasonably rigid under forces like this. A collision changes the velocity to $0$ in a very short time (usually). Accelerations and forces are very large. It isn't simple to analyze. Different parts of the ball can move at different speeds. If you do analyze it, every part decelerates to $0$ in a continuous way. If the collision is elastic, every part acceler
Cites Cort Ammon · 2019-07 · Physics Stack Exchange · on “Why do the surfaces in contact of two colliding balls deform?”
It is true that objects in contact must move the same distance while they are in contact, but its a more difficult way of approaching this. Start with jello. Rapidly shove two blocks of fresh jello together and you'll watch them deform. They deform because forces between the colliding bits are "local." They're electrostatic forces that try to push the atoms of jello block A away from jello block B. Along the surface where they are in contact, this rapidly leads to the atoms moving the same distance at the same time. This effect occurs on the order of microseconds or nanoseconds. To the naked eye, or even to a high speed camera, it looks like it happen instantly. However, the rest of the jell
Cites DarcyThomas · 2020-07 · Physics Stack Exchange · on “How much energy is stored in a evacuated tube?”
So in this video [this video] they have an evacuated tube with a golfball at one end, they quickly open one end and the golf ball shoots out the other, hitting a target. Resulting in a rapid un planned disassembly of the golf ball. This got me wondering how much energy is 'stored' in an evacuated tube; and how you would calculate it?