Levers
What is a lever?
What was the first wheel and axle made for?
Pottery for a potters wheel.
Give two examples of a pulley.
Answers will vary.
Blinds, crane, garage door, well, etc
Give an example of an inclined plane.
Answers will vary.
Wheelchair ramp, plank, slide, skateboard ramp, etc
T or F: A screw and wedge are in close relation to the inclined plane
True.
What are the parts of a lever?
Arms, fulcrum, and the load
Give a real life example of a wheel and axle.
Answers will vary.
Car, bicycle, wagon, etc.
What does a fixed pulley do?
Changes the direction we are pulling to make it more convenient.
BONUS: What is Ms. Barth's favourite colour?
Purple.
Give an example of a screw.
Pickle jar lid.
How many classes of levers are there?
3!
The wheel and axle is better than rollers because...
You need less of them and you have more control over the direction.
T or F: Adding more pulleys will generally make work easier.
True.
Name an example of an inclined plane you would see on a playground.
Slide.
Give an example of a wedge.
Answers will vary. Knife, door stopper, teeth, etc
Give an example for each class of lever.
Answers may vary.
1st: Seesaw
2nd: Wheelbarrow
3rd: Hockey stick
BONUS: What is Mrs. Koenig's favourite food?
Pizza!
Name the three types of pulleys.
Fixed, movable, and compound.
How does using an inclined plane make work easier?
It is like a ramp and you can roll heavy objects up it instead of having to pick them up!
What does a screw consist of?
A cylinder (pole) with an inclined plane wrapped around it in a spiral.
What does FLE stand for in levers?
F - Fulcrum in the middle (1st class)
L - Load in the middle (2nd class)
E - Effort in the middle (3rd class)
T or F: The wheel and axle simple machine is closely related to gears.
True.
Is it less work to use a fixed, movable, or compound pulley?
Compound pulley.
Why do inclined planes make work easier?
It takes less force to move an object in an upward direction on an inclined plane than it does to lift the object straight up.
The sharper the angle of the wedge....
The easier it will be for the wedge to separate something with less force.