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

Classifying Forces

• Scientists classify forces to make them easier to study.

• The classifications of forces are:

  • Contact Forces

  • Non-contact Forces

• Contact forces involve one object touching another object.

• Non-contact forces do not require the objects to touch. They work across a long distance.

Multiple Choice

Why do scientists classify forces?

• To make them easier to study

• To make them harder to study

• The government forces them to

Multiple Choice

Forces are classified as:

• Permanent

  Temporary

• Helpful

  Harmful

• Contact

  Non-Contact

• True

  False

Dropdown

​

Select answer

forces are exerted by objects that are touching,

while ​

Select answer

forces are exerted across a distance.

Multiple Choice

John pushes a box with his hands.

This is an example of a ____ force.

• Contact

• Non-contact

Multiple Choice

Gravity pulls down rain from the sky.

This is an example of a ____ force.

• Contact

• Non-contact

Multiple Choice

A magnet attracts a metal toy from a distance.

This is an example of a ____ force.

• Contact

• Non-contact

Multiple Choice

Two children pull on a rope in tug-of-war.

This is an example of a ____ force.

• Contact

• Non-contact

Balanced or Unbalanced?

• Forces are only balanced if they are equal sizes, but in opposite directions.

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

Multiple Choice

Are these forces:

• 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

Dropdown

"These forces are ​

Select answer

because they are ​

Select answer

in size, but ​

Select answer

in direction."

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

These forces are ____ because _________.

Only UNbalanced forces can change motion!

If the forces are balanced, motion will NOT change.

Multiple Choice

Which forces can change motion?

• Balanced

• Unbalanced

Multiple Choice

Can unbalanced forces change motion?

• Yes

• No

Multiple Choice

Can balanced forces change motion?

• Yes

• No

Multiple Choice

Are these forces:

• Balanced

• Unbalanced

Multiple Choice

Will the cart move?

• Yes

• No

Multiple Choice

Are these forces:

• Balanced

• Unbalanced

Multiple Choice

Will the cart move?

• Yes

• No

Multiple Choice

Are these forces balanced or unbalanced?

• Balanced

• Unbalanced

Multiple Choice

Will the box move?

• Yes

• No

Multiple Choice

Are these forces balanced or unbalanced?

• Balanced

• Unbalanced

Multiple Choice

Will the rope move?

• Yes

• No

Drag and Drop

I predict the log ​

Placeholder

move because the forces are ​

Placeholder

.

Drag these tiles and drop them in the correct blank above

will not

balanced

unbalanced

will

Drag and Drop

I predict the dresser ​

Placeholder

move because the forces are ​

Placeholder

​ .

Drag these tiles and drop them in the correct blank above

will

unbalanced

will not

balanced

Open Ended

"I predict the rope ____ because the forces are ____.

I know this because ___."