Crash Course 4.1 & 4.2 Gravity

Front

What is the force that pulls objects down toward the Earth?

Back

Gravity is the force that pulls objects toward the Earth.

Front

A push or pull acting on an object is called ___

Back

A force is a push or pull acting on an object.

Front

What event led to an 'Aha!' moment for Sir Isaac Newton?

Back

Sir Isaac Newton had an 'Aha!' moment when he was hit by a falling apple.

Front

When we talk about gravity, 'up' just means ___

Back

'Up' means away from the Earth.

Front

A thrown ball will go up or sideways for a little bit ___

Back

Then it will fall to the ground.

Front

What is the definition of gravity?

Back

Gravity is a force that attracts two bodies toward each other.

Front

What happens to an object in free fall?

Back

An object in free fall is only affected by gravity and accelerates downward.

Front

What is the relationship between mass and gravity?

Back

The more mass an object has, the stronger its gravitational pull.

Front

What is air resistance?

Back

Air resistance is a force that opposes the motion of an object through the air.

Front

How does gravity affect the motion of planets?

Back

Gravity keeps planets in orbit around the sun.