Definitions
A device for doing work
Machine
Moveable pulley
How are the wheel and roller the same?
both are circular and both roll, both move objects
Name the 3 parts of a lever
Fulcrum, load, effort
What is an inclined plane?
a long flat surface that is angled
A force that resists motion between two objects that touch or rub together.
Friction
A pulley that does not move and changes the amount of force
Fixed pulley
How are they different
2) The wheel uses an axle
3) You don't need to pick up the wheel and move it to the front like rollers
What is in the middle of a class 1 lever?
Fulcrum
Name 2 examples of an inclined plane
Wheelchair ramps, skateboard ramp, stairs, ladders, slides
A circle frame of hard material that is capable of turning on a axle
Wheel
In a wheel to wheel drive system, the wheels are touching. Do they turn in the same direction?
No, they turn in the opposite direction
Name two examples of rollers
rolling pin, conveyor belt, toilet paper roll, paint roller
What is in the middle of a class 2 lever?
Load
Name 2 examples of wedges
Nails, axe, pushpins, doorstoppers, knives, peelers, grators, flipper
A wheel with a groove in the rim in which a rope moves
Pulley
True or false: A large wheel can apply more work to a smaller wheel by moving it twice as fast
True
Name 3 examples of a wheel and axle
cars, trucks, roller blades, skateboards, scooters,
What is in the middle of a class 3 lever?
Effort
Name an example of a screw
Lid, lightbulb, hose, tap
The pivot point or supporting point of a lever
Fulcrum
True or false: In a belt drive system, the wheels turn in the opposite direction.
False
Which came first ?
Roller
Name an example of a class 1 lever
teeter totter, scissors, pliers, crowbar, hammer pulling a nail