Applied Force
Normal Force
Magnetism
Gravity
Friction
100
Is gravity a visible or invisible force? 

What is an invisible force

200

If you dropped a brick and a quarter, which one would fall faster?

What is they would fall at the rate.

Heavy objects fall at the same rate (or speed) as light ones.

300

What causes an object to have gravity?

What is mass

The reason gravity pulls you toward the ground is that all objects with mass, like our Earth, actually bend and curve the fabric of the universe, called spacetime.

300

The rougher the surface the (More or Less) friction there will be.

What is more

400

Who discovered gravity?

What is Sir Isaac Newton

400

What can decrease an object's friction? 

What is Lubricants 

500

What is the opposite of applied force? 

What is the force of friction

The force of friction is always equal and opposite to the applied force.

500

What would happen without normal force?

What is the object would pass through the surface

500

Is gold magnetic?

What is no

Gold is not magnetic.

500

Where is gravity strongest on earth?

What is the Arctic Ocean

The strongest gravitational field on Earth is located at the surface of the Arctic ocean near the North Pole.

500

What is the hardest type of friction?

What is static friction

Static friction is the strongest form of frictional force followed by sliding friction which is weaker than static but stronger than rolling friction.