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Inertia Overcoming Friction
John weighs 160lbs.
The pie plates beneath his chair legs spread his weight out to reduce friction.
When Professor Hughson yanks the tablecloth away the sudden movement overcomes the 'stickiness' of static friction. John, due to his inertia, remains in place.
Ping Pong Ball through Plywood
Slo-mo of a ping pong ball being pushed by atmospheric pressure through a vacuum tube.
It travels at 750mph - the speed of sound,
and bursts through the plywood easily.
Leaf Blower Thrust!
Thrust from the leaf blower spins Professor Hughson in circles.
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