What is a Pulley
True or False: A pulley is a type of simple machine
True
Which of the following uses a pulley?
a. water well
b. motorcycle
c. drill
d. bicycle
a. water well
True or false: Gears come in many shapes and sizes.
True
A worm gear has a gear that connects to a screw called a _______.
a. bolt
b. worm
c. gear screw
d. screwdriver
b. worm
Describe one way that you could use a pulley in your life.
Answers may vary! Ex. use a pulley to bring lunch up into your tree fort
The object that is being lifted by the pulley is called the __________?
Load
A _________ pulley has a wheel that can move.
Gears change _________, direction, and torque.
a. size
b.length
c. speed
d. colour
c. speed
A _______ gear has teeth that meet at a flat surface.
a. spur gear
b. flat gear
c. worm gear
a. spur gear
What type of pulley is used in an elevator?
Compound pulley (this is the strongest pulley!)
When the rope of the pulley has ______ applied, the wheel moves and helps lift the load.
a. the load
b. force
c. speed
d. strength
b. force
Name the three types of pulleys
fixed, moveable, compound
Is the input component of the bicycle the wheels or the pedals?
The pedals!
Name two types of gears.
Spur gear, worm gear, idler gear, bevel gear, crown gear,
If one gear is moving clockwise (to the right) what directions are the gears beside it moving?
Counter clockwise (to the left)
The wheel of the pulley has a ________ for the rope to run through
groove
Which type of pulley is the strongest?
compound pulley
Name two things that use gears in everyday life.
ex. cars, clocks, bicycles, machines, and drills
True or false: an idler gear is a gear that is that connects at an angle.
False: An idler gear is a gear that is inserted between two other gears. A bevel gear connects at an angle
If I have three pulleys helping me life a giant rock I have to use ______ the amount of force that I would normally use.
a. 1/2
b. 1/4
c. 1/3
d. the same amount of force
c. 1/3
Name three things that use a pulley in everyday life.
ex. well, crane, blinds, elevator, flag poles,
Which type of pulley is usually used in an water well?
fixed pulley
The input gear is also called the _______ gear.
The drive gear
What type of gear has teeth that are at a right angle to the face of the wheel.
A crown gear
What is the force that we are acting against when we are using a pulley?
Gravity