Forces and Friction

By Angela Toh

Forces Lesson 1

Multiple Choice

What is a force?

• Simply a push or a pull

• Star Wars, “may the force be with you.”

• When moved upon an action upon it

• A force

Multiple Choice

A push and a pull are two examples of which of the following?

• a force

• a balanced force

• a law of motion

• . velocity

Multiple Choice

What are Contact Forces?

• Forces that have no life

• Forces that make contact with each other

• Forces that don’t make contact

• Forces that make contract with each other

Multiple Choice

What is an example of a Contact Force

• Friction

• A contact

• Newton

• Forces that are so cool

Multiple Choice

What are Act-At-Distance Forces?

• Forces that do not touch

• Forces that run lots of miles

• Forces that are in contact

• Forces that watch Star Wars

Multiple Select

2 examples of a Act-At-Distance Force

• Gravity

• Magnetic

• When you run a long Distance

• When you use the force to to lift you up and get to brag to your friends

Multiple Select

Did you get it? REFER TO TEXTBOOK.

No forces are acting on a spacecraft. Which of the following is/are impossible?

• The spacecraft speeds up.

• The spacecraft slows down.

• The spacecraft travels at constant speed.

• The spacecraft remains at rest

Multiple Choice

What is a force?

• When a beam is balanced

• A push or a pull

• Mass

Multiple Choice

The unit for Forces

• Newtons

• Newton

• N

• All of above

Multiple Choice

What is the unit to MEASURE force?

• Kilogram
• Meter
• Pascal
• Newton

Multiple Choice

A ____________ is a push or a pull on an object.

• friction
• force
• magnet
• gravity

Multiple Choice

If you drop a pencil and it falls to the floor, what force is it experiencing?

• A push

• Magnetism

• A balanced force

• A pull

Multiple Choice

Seif throws a ball into the air and watches it go up for a long time. Then it starts to fall back toward him. What force causes the ball to return to the ground?

• friction

• gravity

• motion

• wind

Multiple Choice

Which beam is balanced?

Multiple Choice

Which level below would show that a balance has equal masses on both sides?

Multiple Choice

Arrows represent the forces applied to an object. A longer arrow means a greater force. Which object will move upward?

Multiple Choice

Look at the diagram of forces acting on an object. The picture shows a push and a pull acting on a box of books sitting on the floor. What is the net force toward the right on the box?

• 0 N

• 50 N

• 100 N

• 2,500 N

Multiple Choice

What is the net force of this object? 

• 10 N, no direction
• 10 N left
• 5 N right
• 0 N no direction

Multiple Choice

When Izzy and Zoe pull on the rope with the same amount of force, the forces are _____.

• increased

• unbalanced

• balanced

• decreased

Multiple Choice

Why did Izzy fall when playing tug of war?

• he tripped

• unbalanced forces

• balanced forces

• he was pushed

Multiple Choice

Why is the egg NOT moving before Zoe hits the pan?

• forces are balanced

• forces are unbalanced

• there are no forces

• none of these

Multiple Choice

If these teams are pulling with the same amount of force what will happen?

• The boy in blue will win.
• They will not move at all.
• The boy in red will win.
• Both will fall down.

Multiple Choice

Balanced or unbalanced?

• balanced
• unbalanced

Multiple Choice

Forces that have a net force of zero 

• Balanced force
• Unbalanced force

Multiple Choice

The sum of all forces acting on an object.

• Contact Force
• Balanced Force
• Unbalanced Force
• Net Force

Multiple Choice

What will cause an object to move?

• Applied forces
• Balanced forces
• Unbalanced forces

Multiple Choice

If an object is not moving the forces acting upon it are _____________

• unbalanced
• weak
• balanced
• Hulk Smash!