Net Forces

Net Forces

In this lesson, we will explore how forces interact with each other on an object.

Multiple Choice

A pull on an object is a type of

• Energy

• Force

• Speed

• Mass

Multiple Choice

Which of the following causes an object to start moving?

• balanced forces

• unbalanced forces

• either balanced or unbalanced forces

• any combination of forces

Multiple Choice

What unit is used to measure forces in the Metric System?

• Grams

• Newtons

• Neutrons

Multiple Choice

What tool do we use in class to measure forces?

• spring scale

• balance

• hand lens

• tape measure

Multiple Choice

How much force does the line on the arrow represent?

• 5 N

• 5.0 N

• 0.5 N

• 2.5 N

Multiple Choice

And here?

• 4.5

• 33

• 4

• 3.3

Multiple Choice

How much force here?

• 1.1

• 11

• 10.1

• 1.5

Fill in the Blanks

And lastly, here?

Multiple Choice

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

• unbalanced

• positive

• balanced

• negative

Multiple Choice

With unbalanced forces, the object will move in the direction of the _______ force.

• larger 

• smaller 

• equal 

Multiple Choice

The sum of all forces acting on an object.

• Contact Force

• Balanced Force

• Unbalanced Force

• Net Force

Multiple Choice

With unbalanced forces, the object will move in the direction of the _______ force.

• larger 

• smaller 

• equal 

Multiple Choice

If there are two forces going in the SAME direction, you would ...?

• (-) Subtract the forces

• (+) Add the forces

• Neither

• (x) Multiply

Multiple Choice

If there are two forces going in DIFFERENT directions, you would ...?

• (-) Subtract the forces

• (+) Add the forces

• Neither

• (x) Multiply

Multiple Choice

Which direction will the object move?

• Up

• Down

• Right

• Left

Multiple Choice

Which direction will the net force be?

• Right

• Left

• Up

• Down

Multiple Choice

If these boys 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

The net force acting on the object is acting

• to the right

• up

• down

• to the left

Fill in the Blanks

The net force is

N.

Multiple Choice

What is the net force needed to stop this box.?

• 40 N, up

• 40 N, down 

• 40 N, left 

• 40 N, right 

Multiple Choice

How do you find the net force of this image.

• Add up all the arrows

• Add a green arrow and the orange arrow.

• Subtract all the arrows.

• Add the green arrows and subtract the orange arrow.

Multiple Choice

What is the net force?

• 5.5 N left

• 5.5 N right

• 2.5 N left

• 2.5 N right

Multiple Choice

If the boy is pulling with a force of 10 N and the girl is pushing with a force 20 N, what is the net force on the box?

• 10 N

• 20 N

• 30 N

• 0 N

Multiple Choice

What is the net force?

• 65 N left

• 65 N right

• 35 N left

• 35 N right

Multiple Choice

What is the net force?

• 4.2 N left

• 4.2 N right

• 2.2 N left

• 2.2 N right

Multiple Choice

You and your best friend are moving the couch from one side to another. Your friend pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?

• 60 N right

• 10 N left

• 60 N left

• 35 N right

Multiple Choice

What is the force needed to stop this car?

• 3 N, left

• 3 N, right

• 17 N, right

• 17 N, left