Forces and Free Body Diagrams

Whenever an object is moving, there is always this force opposing the motion:

• inertia

• momentum

• friction

• applied force

If an object is moving to the right, this force is pushing or pulling to the left:

• friction

• applied

• normal

• tension

Tags

NGSS.HS-PS2-1

The force that keeps objects on top of surfaces instead of letting them sink into the surface is known as:

• normal

• abnormal

• static

• inertia

The force exerted by ropes and chains is called

• tension

• normal

• elastic

• mechanical

In a force diagram, or free-body diagram, the size/length of the arrow tells you this about the force:

• relative strength

• relative distance

• relative direction

In a force diagram, or free-body diagram, the pointy-end of the arrow tells you this about the force:

• relative strength

• relative distance

• relative direction

With few exceptions, forces

• always come in pairs

• are always equal

• must be balanced

• must be unbalanced

Tags

NGSS.MS-PS2-1

Paired forces are

• in opposite directions

• always equal

• not possible

• added together

When determining the NET force on an object you should (TWO correct answers)

• subtract forces in opposite directions

• add forces in the same direction

• divide by velocity

• multiply by acceleration

Tags

NGSS.MS-PS2-2

What is the NET FORCE of this diagram?

• 17 N, right

• 17 N, left

• 23 N, right

• 12 N, up