Crash Course 4.1 & 4.2 Gravity

Front

What does 'up' mean when we talk about gravity?

Back

'Up' means away from the Earth.

Front

What event led to Sir Isaac Newton's discovery of gravity?

Back

He was hit by a falling apple.

Front

What is a push or pull acting on an object called?

Back

A force.

Front

What happens when a penguin tries to jump?

Back

It is forced back to Earth.

Front

Which type of objects are pulled toward Earth?

Back

All objects.

Front

What is gravity?

Back

Gravity is a force that pulls objects toward each other, especially toward the Earth.

Front

Who formulated the law of universal gravitation?

Back

Sir Isaac Newton.

Front

What is the effect of gravity on objects in free fall?

Back

They accelerate towards the Earth at 9.8 m/s².

Front

What is weight?

Back

Weight is the force of gravity acting on an object.

Front

How does mass affect gravity?

Back

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