Forces Day 2 - Balanced or Unbalanced?

Balanced or Unbalanced?

How do forces cause motion?

Review - Forces and Motion

• All objects are in motion or still.

• To make a still object move, you must apply force.

• A force is a push or a pull.

• Forces can move in any direction.

• Forces can be strong or weak.

Multiple Choice

A ball sitting on a shelf is ____.

• Still

• In Motion

Multiple Choice

A ball bouncing on the court is ____.

• Still

• In Motion

Multiple Choice

To make a still object move, we need to apply ____.

• A force

• Sunscreen

• Early

Multiple Choice

Which force will move an object more?

• A strong force

• A weak force

Multiple Choice

A snow plow and a person each push a pile of snow.

Which one will probably move the snow more?

• The snow plow

• The person

Balanced Forces

• Balanced forces will NOT change an object's motion.

• Forces are balanced when:

• Equal in size AND

• Opposite in direction

Multiple Choice

Will balanced forces change an object's motion?

• Yes

• No

Multiple Choice

Balanced forces ____ change an object's motion.

• Will

• Will not

Multiple Choice

If an object's motion changes, the forces must be ____.

• Balanced

• Unbalanced

Multiple Choice

These two forces are ___.

• Balanced

• Unbalanced

Multiple Choice

These two forces are ___.

• Balanced

• Unbalanced

Multiple Choice

The strength of the two forces is ____.

• Equal

• Unequal

Multiple Choice

The two forces are pulling in ____ direction.

• The same

• The opposite

Open Ended

"These forces are balanced because they are ____ in size, but ____ in direction."

Unbalanced Forces

• Unbalanced forces change an object's motion.

• Forces are unbalanced when:

• Unequal in size OR

• In the same direction

Multiple Choice

Will unbalanced forces change an object's motion?

• Yes

• No

Multiple Choice

Unbalanced forces ____ change an object's motion.

• Will

• Will not

Multiple Choice

These two forces are ____

• Balanced

• Unbalanced

Multiple Choice

These two forces are ____

• Balanced

• Unbalanced

Multiple Choice

These forces are unbalanced because ____.

• They're in the same direction.

• They have different sizes.

Multiple Choice

These forces are unbalanced because ____.

• They're in the same direction.

• They have different sizes.

Open Ended

I predict this car ____ move because _________.

Forces are only balanced if:

Equal in Size and

Opposite in Direction

Multiple Choice

Are these forces:

• Balanced

• Unbalanced

Multiple Choice

Are these forces:

• Balanced

• Unbalanced

Multiple Choice

Are these forces:

• Balanced

• Unbalanced

Multiple Choice

Are these forces:

• Balanced

• Unbalanced

Multiple Choice

Are these forces:

• Balanced

• Unbalanced

Open Ended

Describe one new thing you learned today.