(Un)Balanced Forces

​Balanced & Unbalanced Forces

​* Definition 1. The net force is the force when more than one force acts up on the object

​* Forces always happens in pairs

* Pairs of forces can be balanced or ​unbalanced

​Pairs of forces:

• Force or reaction (F_N) & Force of gravity​ (W)

• Force of friction (F_f) & Force applied (F_app)

Draw

Label the forces. Include friction and a push force

Fill in the Blank

Are the forces balanced?

Fill in the Blank

What is the overall force (net force) on the box?

Open Ended

Will the box move? Explain your answer

Draw

Label the forces. Include friction and a push force

Fill in the Blank

Are the forces balanced?

Fill in the Blank

What is the overall force (net force) on the box?

Open Ended

Will the box move? Explain your answer

Draw

Label the forces. Include friction and engine force

Fill in the Blank

Are the forces balanced?

Fill in the Blank

What is the overall force (net force) on the box?

Open Ended

Will the car go faster, slower or stay at the same speed? Explain your answer

Open Ended

The force to the right is increased to 1500N. What is the overall force (F_net) on the car? Will the car go faster, slower or stay at the same speed? Explain your answer

​(F_net)

Fill in the Blank

Determine the net force (F_net) acting upon the object

Fill in the Blank

Determine the net force (F_net) acting upon the object

Fill in the Blank

Determine the net force (F_net) acting upon the object

Fill in the Blank

Determine the net force (F_net) acting upon the object

Draw

Determine the magnitude (value) of the unknown forces

Draw

Determine the magnitude (value) of the unknown forces

Draw

Determine the magnitude (value) of the unknown forces

Draw

Determine the magnitude (value) of the unknown forces

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Multiple Choice

Which arrow represents air resistance

• A

• B

• C

• D

​air resistance

​engine force

​mechanical force that is produced by movement of an object through the air

​weight is the mass of the plane multiplied by acceleration due to gravity (F_g)

Open Ended

When the plane is flying at a constant height, which of the two forces must be balanced?

Open Ended

When the plane is flying at a constant speed, which of the two forces must be balanced?

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​-There is NO CHANGE in motion