What type of machine is it?
What type of machine is a wheelbarrow
Lever (2nd Class)
What is an inclined plane wrapped around a cylinder called?
Screw
A wheelbarrow is what kind of lever?
second class
Name five things that use wheel and axle
cars, bikes, motorcycles, skateboards, shopping carts, airplane landing gear
What is a gear?
wheel with teeth around the edge
What type of machine is an ax?
Wedge
Name three things that use screws/twisting planes
jar lids, light bulbs, construction, faucets, car jacks
A seesaw is what kind of lever?
first class
What is an axle?
rigid bar inserted into a hole in the wheel
What is a transmission?
series of intermeshing gears that turn each other
What type of machine is use at the base of a lightbulb
screw
Give two examples from history where inclined planes were used
building the pyramids, boats used to sail on the Nile, Greek diokolos (moved boats over land)
In a see saw, what is the fulcrum?
the middle point in between the two seats
Name three things that use belts
conveyor belt, treadmill, cars, sewing machine, vacuum cleaners, bicycles
Name three machines that use gears
watches, clocks, cars, bikes
What kind of machine is used to raise sails on a boat?
pulleys
What takes more energy... lifting a box onto a moving truck or pushing it up a ramp to the truck?
They require the same amount of energy
Identify the fulcrum, force, and load in someone lifting a glass of water
Force= arm muscles
Fulcrum= elbow
Load= glass of water
What is a belt
A circular band usually made of rubber
What is special about the wheel in a pulley system?
it has a groove in it (to hold a rope or chain)
What type of machine is a treadmill? (be specific)
Conveyor belt
Why do inclined planes seem to reduce the effort needed?
They spread the force out over a longer distance
Identify the force, fulcrum, and load in using tweezers to remove a splinter
Load= splinter
Force= pinching in the middle of the tweezers
Fulcrum= end where the tweezers meet
Describe how a belt system works
A wheel turns and drags the belt around, which carries movement to other components
Why does a pulley seem to make work easier?
It changes the direction of force (its easier to pull down than push up)