Force Body Diagrams 2025

Fill in the Blanks

Yesterday, we learned that in order to make the rock move an

force is needed.

Today we're going to learn WHY!

Multiple Choice

What happens when a hamster stops running in its wheel?

• The wheel stops moving.

• The wheel keeps moving.

Multiple Select

CHOOSE 3. Which of the following statements about inertia is correct?

• Inertia makes it hard to stop a moving object.

• Inertia makes it hard to move an object at rest.

• Inertia makes it hard to change the direction of a moving object.

• Only some objects have inertia.

Multiple Choice

Which would be harder to stop and why?

• Bowling ball because it has more mass.

• Beachball because it has less mass.

Multiple Choice

Which would be harder to move and why?

• Large boulder because it has more mass.

• Small pebble because it has less mass.

Multiple Choice

Which would be easier to turn and why?

• Tractor trailer because it has more mass.

• Motorcycle because it has less mass.

Drag and Drop

Why is it harder to change an elephant's motion than a human's motion?

The elephant has more ​

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and therefore has more​

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mass

inertia.

Multiple Choice

Which would have more inertia: a moving toy car or a large parked truck?

• Moving toy car

• Large parked truck

Dropdown

The more inertia an object has, the ​

Select answer

it is to change its motion.

Multiple Choice

According to Newton's 1st Law, what will happen to an object in motion if a balanced force acts on it?

• It will stop moving

• It will change direction

• It will keep moving in a straight line

• It will speed up

Multiple Select

CHOOSE 3. According to Newton's 1st Law, what will happen to an object in motion if an unbalanced force acts on it?

• It will stop moving

• It will change direction

• It will keep moving in a straight line

• It will speed up

Multiple Choice

Which of the following best describes what happens to an object at rest when an unbalanced force acts upon it?

• It remains at rest.

• It starts moving.

• It disappears.

• It changes shape.

Multiple Select

Which TWO of the following scenarios involve unbalanced forces?

• A soccer ball being kicked by a player

• A basketball held still in a player's hands

• A car moving at a constant speed on a straight road

• A ball slowing down after being thrown

Categorize

Options (5)

Object at rest

Object moving at constant speed

Object slowing down

Object speeding up

Object turning

Identify each example as Balanced or Unbalanced

Balanced (B)

Unbalanced (U)

Multiple Choice

When an object is moving at a constant speed, what can you say about the forces acting on it?

• The forces are balanced.

• The forces are unbalanced.

• There are no forces acting on it.

• The object will stop immediately.

Multiple Choice

Which of the following situations describes a balanced force?

• A car speeding up

• A ball turning

• A book lying on a table

• A runner slowing down

Multiple Choice

What is similar about the forces acting on a person riding a bike at constant speed and a person parachuting down at constant speed?

• Both are experiencing balanced forces

• Both are accelerating

• Both are at rest

• Both are experiencing unbalanced forces

Multiple Choice

According to the instructions for calculating net force, what should you do if two forces are acting in the same direction?

• Subtract the forces

• Add the forces

• Multiply the forces

• Divide the forces

Multiple Choice

Two people are pushing a sofa in the same direction with forces of 25 N and 20 N. What is the net force acting on the couch?

• 5 N

• 20 N

• 25 N

• 45 N

Multiple Choice

What is the net force of the tug of war?

• 20 N left

• 620 N left

• 20 N right

• 0 N

Multiple Choice

What is the net force of the elephants?

• 200 N left

• 400 N right

• 200 N right

• 0 N

Multiple Choice

What is the net force of the soccer ball?

• 50 N left

• 50 N right

• 200 N left

• 0 N

Fill in the Blanks

What is the net force (N) of an object when it is standing still or moving at a constant speed? _ N

Drag and Drop

Match the example to the type of force.

1) force that holds a book up on a table ​

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2) force that keeps the Earth orbiting the Sun​

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3) force from a person pushing a box ​

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4) force that makes it hard to roller skate on carpet ​

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5) force that keeps a feather floating in the air ​

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normal

gravity

applied

friction

air resistance

Labeling

A book is at rest on the table. Label the forces acting on the book.

Drag labels to their correct position on the image

F gravity

F normal

Dropdown

An egg falls from a nest in a tree. (Neglect air resistance).

What force is acting on the egg?​

Select answer

Labeling

A flying squirrel is gliding (no wing flaps) from a tree to the ground at constant velocity. Consider air resistance.

Label the forces acting on the squirrel.

Drag labels to their correct position on the image

F air resistance

F gravity

Labeling

A rightward force is applied to a book in order to move it across a desk. Consider frictional forces. Neglect air resistance.

Label the forces acting on the squirrel.

Drag labels to their correct position on the image

F friction

F gravity

F normal

F applied

Drag and Drop

A skydiver is descending with a constant velocity.

The velocity is constant so the forces are ​

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The downward force is ​

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The upward forces is ​

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gravity.

balanced.

unbalanced.

air resistance.

normal.

applied.

Labeling

A man drags a sled across loosely packed snow with a rightward acceleration.

Label the forces.

Drag labels to their correct position on the image

F applied

F normal

F gravity

F friction

TIME TO REVIEW!

Multiple Choice

What is inertia?

• the force that opposes motion
• the force of attraction between 2 objects
• an object's tendency to stay in motion or to stay at rest
• a change in an object's speed and/or direction

Drag and Drop

​

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forces cause the motion of an object to change, while ​

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forces cause the motion to stay the same.

Drag these tiles and drop them in the correct blank above

Balanced

unbalanced

Multiple Choice

What is the magnitude and direction of the force in the free body diagram shown?

• 70 N right

• 70 N left

• 50 N right

• 50 N left

Multiple Choice

Name the missing force...

• air resistance force

• normal force
• applied force
• frictional force