W=Fd
What do we measure in meters?
Distance
A push or a pull is called a...
force
Do simple machines change the amount of work done?
NO. (They reduce the effort needed to do the work.)
Scissors
First Class
Which simple machine converts a downward force into a horizontal force, which is useful in splitting an object into two parts?
Wedge
What is force measured in?
Newtons
What is a board or other flat surface that is set at an angle to a surface?
Inclined Plane
Broom
Third Class
Which simple machine helps connect objects together?
Screw
What is work measured in?
Joules
The ability to do work is called...
energy
Which simple machine is comprised of two inclined planes placed back to back?
Wedge
Second Class
When you increase the number of threads on a screw, do you need to apply a stronger or smaller force?
Smaller
A man applies a force of 50 Newtons to move a box 10 meters. How much work did he perform?
Work = 50 N × 10 m
Work = 500 J
A tool that makes it easier to perform work is a...
simple machine
Which simple machine consists of a wheel attached to a rod?
Wheel and Axle
Stapler
Second Class
How much force is needed to lift a 10 N box with one pulley?
10 N
•A girl applies a force of 30 Newtons to push a suitcase 30 meters. How much work did she perform?
Work = 30 N × 30 m
Work = 900 J
What is the pivot point on a lever called?
Fulcrum
Which simple machine is a wheel with a groove around its outside edge that is for a rope or belt?
Pulley
Tweezers
Third Class
What is the general name for a machine that is made of two or more simple machines?
Compound Machine