Gravity
What keeps the planets in orbit around the sun?
Gravity
A push or pull on an object is called a _______.
Force
Which surface has more friction—carpet or ice?
Carpet
What happens when you put two north poles together?
Who discovered gravity after seeing an apple fall?
Sir Isaac Newton.
When forces are balanced, what is the motion of the object?
No motion. No movement. Still. Stationary. Does not move. Etc.
What happens to friction when oil is added to a surface? Does it increase or decrease?
It decreases
What are the poles called at the end of magnets?
North and South
The Moon has ________ gravity than Earth.
Less
What kind of force resists motion between two surfaces?
Friction
When you rub your hands together, what does friction create?
Heat
What happens when opposite poles are near each other?
They attract
The more mass an object has, the ________ its gravitational pull.
Stronger or greater
What are the four main categories of forces we learned about ?
Contact vs. Non-Contact
Balanced and Unbalanced
Which has the least amount of friction? An ice rink, a gravel road, carpet, or grass?
An ice rink
All Magnets are ________ but not all ________ are magnets. Fill in the missing WORD. The answer is one word.
Metal(s)
True or False: A heavier object falls faster than a lighter one because it has more gravity pulling on it. Explain
FALSE.
All objects fall at the same rate in gravity when there’s no air resistance — they accelerate equally because gravity pulls on all masses the same.
What type of force is applied when pushing a door open?
Either answer: Applied force, Contact force, or Unbalance force
In what situation would friction be "not useful?"
Answers can include but are not limited to sliding down a slide, ice skating, roller coasters, sliding a heavy box, etc.
The area around a magnet where magnetic forces act is called the ________.
Magnetic field