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TEC 2 - Friction wheels, and Belt and Pulley sy ...
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What are some examples of where belt and pulley systems are used given in the textbook?
Washing machines, conveyor belts, fans
True or False: belt and pulley systems are loud and expensive mechanisms
False, they are quiet and inexpensive
True or False: belt and pulley systems transmit periodic motion between shafts located at different points
False, the provide rotary motion
Is it possible to make the the wheels rotate in opposite directions? How?
Yes, by changing how we attach the belt
What happens in a belt and pulley system?
When one of the wheels is rotated, the belt transmits the motion and makes the other wheel rotate.
What is the name of the system that is made up of two pulley wheels joined by a belt that slots into the grooved rim of the wheels
A Belt and Pulley system
Does the speed multiply or reduce when the driven wheel is bigger than the driver wheel?
It is reduced
Does the speed multiply or reduce when the driven wheel is smaller than the driver wheel?
It multiplies, because the smaller wheels have to turn faster than the bigger ones in order to transmit motion
What are some examples of where friction wheels are used? (from the textbook)
water wheels, record players, electronic equipment
Why can friction wheels be subject to wear and tear when they are used over long periods of time?
Because the transmission is obtained through friction
True or False: The driven wheel always rotates the same direction to the driver wheel
False, the driven wheel rotates in the opposite direction to the driver wheel
True or false: friction wheels can slip so they are not used to transmit large amounts of power
True
What is the name of the ratio between the size of the wheels and the speed of rotation?
Transmission ratio (i)
For friction wheels, the speed at which the wheels rotate is measured in what?
Revolutions per minute (rpm)
What type of numbers are driven wheels identified by?
Even numbers
What type of numbers are driver wheels usually identified by?
Odd numbers
How would you describe friction wheels?
Friction wheels are a set of two wheels located one next to the other
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