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how does upthrust work
when an object is submerged in fluids pressure of the fluid exerts a force on it from every direction
pressure increases with depth, larger at bottom
resultant force upwards
elasticity
a force that stretches or compresses a spring does work, and e.p.e is stored in the spring, equal,
extension of an elastic object is directly proportional to the force applied, provide limit of proportionality isn’t exceeded
levers
allow a larger force to act upon the load then is supplied by the effort, so easier to move larger and heavier objects
high gear
driving gear larger than driven gear
high speed in driven
lo turning moment in driven
good for speeding up
low gear
driving gear smaller than driven gear
lo speed in driven gear
high turning moment in driven gear
more upthrust
object that’s less dense than fluid its paced in weighs less than the equivalent volume of fluid
means it displaces a volume of fluid that’s equal to its eight before its completely submerged
