Free Body Diagram

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

• inertia

• momentum

• friction

• applied force

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

• normal

• abnormal

• static

• inertia

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NGSS.3-PS2-1

With few exceptions, forces

• always come in pairs

• are always equal

• must be balanced

• must be unbalanced

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NGSS.MS-PS2-1

Paired forces are

• in opposite directions

• always equal

• not possible

• added together

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NGSS.MS-PS2-1

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

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NGSS.MS-PS2-2

This object would be moving (pick all that are correct):

• up

• down

• left

• right

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NGSS.HS-PS2-1

The up-arrow in this diagram is most-likely:

• gravity

• normal

• a push or pull

• friction

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

This diagram can be used to indicate which of the following? (TWO correct answers)

• a object at rest

• an object moving at a constant velocity (speed)

• an object accelerating

• (Trick question -- there is only one correct answer)

• an object decelerating

A box is moving to the left up a ramp. Which way is the force of friction pointing?

• down the ramp to the right
• up the ramp to the left
• there is no friction
• straight up

Tags

NGSS.HS-PS2-1

How many forces are on a leopard laying on a log?

• 1

• 2

• 3

• 4