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Ask the Van Questions by Subcategories
Making Stuff Move: Friction
Tribology: the Study of Friction
Classifying Friction
Tennis without Sliding
Friction slows stuff down.
Perpetual Motion?
Trolley on Ramp
What is friction?
Why friction?
Retarding Forces
Not-So-Heavy Friction
Motion without friction
Plastic sleds
Balls: does size count?
Friction force on a car
Friction our 'friend'?
Slowing Everything Down
The Speed of Gravity
Calculating the coefficient of friction
friction and falling rates
rapid car deceleration
drill bit heating
work = force times distance ?
why don't balloons keep moving sideways?
rotation from gravity
Feather and cannonball race in various gasses
sandy balls rolling down
gravity, air resistance, falling
roofing friction tests
What happens when push equals static friction?
friction slowing balls
air resistance in sliding down ramp
Why does my mom beat me in a downhill bicycle race?
Why is friction necessary for transport?
wet and dry friction
free-body diagrams
weight and variable friction
low friction coefficients
heat from compression and friction
bikes: does weight matter?
friction and surface area
frictionless turbine in space?
Baumgartner's freefall
magnets and eddy currents
roller coaster friction
Forces on a magnetic compass
Towing a car with a flat tire (tyre)
Gravity, friction, and rope climbing.
Galileo's superposition and bullet trajectories
friction and surface area
internal friction
friction and Newton's laws
what causes friction?
Determining the coefficient of friction
Galileo's falling balls
rolling friction
how anchors work
maglev friction on inclines
friction basics
Moment of inertia: Container of water
Lenz's Law: magnets slowed by eddy current
What is friction? Baloney?
friction and heat
scooting through deep water
friction, weight, gravity
friction and area
Perpetual motion, again...
friction measurements
Throwing something out of a car
Speed of an object and air friction?
car acceleration
bicycle tire friction
friction in fluids
inertia
friction etymology
friction and speed
heating via friction
falling in water
bullets dropped and fired
velocity and friction
