Terms
a downward force created by mass
What is Gravity
objects are moving, there is usually a force that tries to stop or slow that movement down
Friction
Something that is being stretched
What is tension
Give 3 examples of a machine that helps us do work and make it easier for us
wedges, pulley, lever, ramp
When an object is squeezed
What is compression?
a push or a pull
What is Force
a pull or push that a magnet can have on objects
Magnetic
Tug of War
Tension
Used to measure Newtons
What is a Spring Scale
Force is measured in these units
What is a Newton
makes work easier
What is a machine
invisible force which pulls objects together
Gravity
Walnut being cracked
compression
What are the 3 main parts of a spring scale
spring, pointer and hook
when something bends easily
Flexible structure
force caused by air
what is Air Pressure
a mass pushing down on a person
Air Pressure
Kung Fu Fighter hits a board
Both tension and compression
Who was the first person to describe the force of gravity
Isaac Newton
toothed wheels or rods that interlock
What is a gear
when a force pulls on an object
What is tension
the air inside a balloon
what is an example of Air Pressure
squeezing a marshmallow
compression
The most common force acting on a structure
Force of gravity
any system that uses one or more simple machines
What is a mechanical system