Topic 1: Motion and Forces Review

Front

What happens if a force is unbalanced?

Back

The object will start moving.

Front

How can Sophie’s brother help her get the wagon up the hill?

Back

By pushing the wagon to make the forces unbalanced, resulting in a net force greater than 0.

Front

Why did the boy stop moving on his skateboard?

Back

Because there was a lot of friction between the grass and the skateboard.

Front

What does it mean if a box is in motion?

Back

It means the box is moving.

Front

What can balanced forces cause?

Back

An object to stay still or move at a constant speed and direction.

Front

What is friction?

Back

Friction is a force that opposes motion between two surfaces in contact.

Front

What is a net force?

Back

The overall force acting on an object when all the individual forces are combined.

Front

What is the difference between balanced and unbalanced forces?

Back

Balanced forces do not change an object's motion, while unbalanced forces cause an object to accelerate.

Front

What is gravity?

Back

Gravity is a force that pulls objects toward each other, such as the Earth pulling us down.

Front

What does it mean for an object to accelerate?

Back

To accelerate means to change speed or direction.