Types of forces
_____, and ____ are types of magnets
bar and horseshoe
can you permanently change the shape of the sponge?
NO
What causes Friction
Irregularities on two surfaces
Who discovered gravity
Isaac Newton
What is work
Work is done when force causes an object to move
____________ pulls an apple to the ground
gravitational force
If you crush a bottle, how do you get it back to shape?
by blowing into it
is friction contact or non-contact?
contact
what is weight?
How much gravity is pulling down on something
people mix up _____ and ____
upthrust and buoyancy
what force is happening when a car's wheels roll over a road
Friction
What are 3 types of friction?
Rolling, sliding and static
Gravity pulls to the earth's ______
core