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PS Ch 13/14 Vocab Review

Teacher: Springston
Across
The work done by the input force acting through the input distance
The upward force that acts in opposition of gravity
A simple machine that consists of a rope that fits into a groove in a wheel
The rate at which work is done
The SI unit for work
V-shaped object whose sides are two inclined planes
The ratio of the output force to the input force
The distance the input force acts through
The upward force on an airplane wing created by a pressure difference
The number of times that the machine increases an input force
The mechanical advantage in the absence of friction
The IMA of a pulley is determined by counting the number of ____ ____ supporting the load being lifted
A combination of two or more simple machines that operate together
Rigid bar that is free to move around a fixed point
The output force multiplied by the output distance
Because ___ is always present, the AMA of a machine is always less than the IMA
The SI unit for pressure
The force you exert on a machine
Down
When the buoyant force is less than the weight of an object, the object will
The force that is exerted by a machine
A slanted surface along which a force moves an object to a different elevation
Part of a lever, the distance between the output force and the fulcrum
The product of force and distance
The distance the output force is exerted through
A device that uses pressurized fluid acting on pistons of different sizes to change a force
Simple machine that consists of two disks or cylinders, each one with a different radius
This scientist's principle states that the buoyant force on an object is equal to the weight of the fluid displaced by the object
A substance that assumes the shape of its container
A common unit of power, it's equal to about 746 watts
This scientist's principle states that as the speed of a fluid increases, the pressure within the fluid decreases
An inclined plane wrapped around a cylinder
A device that changes a force
Machines make ___ easier to do