Levers
What is one purpose of a lever?
It moves something heavy
It makes something go fast
It helps lift things
What is one purpose of a pulley?
To raise or lower loads.
To lift loads.
Give an example of a wheel & axle.
Answers may vary. (e.g. ferris wheel)
Give an example of an inclined plane.
Answers may vary. (e.g. a slide)
Name the 6 different simple machines.
Lever, Pulley, Wheel & Axle, Wedge, Inclined Plane, Screws
What is an example of a first class lever?
Seesaw
Scissors
Catapault
Explain what a pulley is.
A rope, belt, or chain wrapped around a grooved wheel/hook.
Give an example of a wedge in the classroom.
Answers may vary. (e.g. doorstopper)
Give an example of a screw in the classroom.
Answers may vary.
(e.g. water bottle cap)
What is the purpose of a simple machine?
A simple machine helps make work easier for people.
What is an example of a second class lever?
Wheelbarrow
Opening a can lid with a butter knife
What is a fixed pulley?
A pulley attached to a ceiling or another object. It cannot move.
If I am pushing a wheelbarrow down a hill. What simple machine is the hill representing?
An Inclined Plane.
What is the purpose of an inclined plane?
It spreads out the amount of work you do.
What is a compound machine?
A compound machine is a machine made up of many simple machines.
What is an example of a third class lever?
Tweezers
Broom
Tennis racket
What is a moveable pulley?
A pulley that is not attached to anything.
What is the purpose of the wedge?
It can be used to separate two objects.
Lift up an object.
Hold an object in place.
What is one purpose of the screw?
Move objects.
Raise objects.
Fasten objects together.
Give an example for each simple machine.
Answers may vary.
Explain what a fulcrum is.
A fulcrum is like a pivot point. It does not move and it is where the lever sits.
Give an example of a fixed pulley and a moveable pulley. What is its main difference?
Fixed pulley: blinds
Moveable pulley: zip line
Main difference: Moveable pulleys are attached to something, fixed pulleys are not.
What is one purpose of the wheel and axle?
Used to move/lift/turn things.
The screw is a family of the wheel & axle. True or False?
False. To get the points, please answer: What simple machine family if the screw part of?
Your body contains simple machines. True or False?
True. Our teeth are like wedges when it chews food, our elbow Is like a fulcrum while our arm is like a lever.