Balanced and Unbalanced Forces Free Body Diagrams

A laptop sitting on a desk has balanced forces acting on it

• true

• false

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NGSS.3-PS2-1

Forces that are equal in magnitude (size) and opposite in direction are

• contact

• non-contact

• balanced

• unbalanced

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NGSS.MS-PS2-1

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Kicking a ball is an example of a

• balanced force

• unbalanced force

• contact force

• non-contact force

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Both of the people in this image pull with a force of 50 newtons. They are pulling in opposite directions.

What is the resultant force?

• 0 Newtons

• 10 Newtons

• 50 Newtons

• 100 Newtons

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

If the people pull with a force of 50 N each, which direction would the cart move?

• right

• left

• up

• stay still

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

If the people pull with a force of 50 N each, what would the resultant force be?

• 75 N

• 100 N

• 0 N

• 50 N

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Forces can come in different sizes.

The scientific word for the size of a force is

• size

• largness

• big

• magnitude

The resultant force in the image is 100 N to the left.

If the blue person pulls with a force of 150 N, what force does the red person apply?

• 100 N

• 50 N

• 0 N

• 150 N

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NGSS.MS-PS2-1

NGSS.MS-PS2-2

Forces that are opposite in direction can cancel each other out. The left over force is called

• left over force

• gravity force

• friction force

• resultant force

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NGSS.MS-PS2-2

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An object with unbalanced forces acting on it may

• change shape

• change direction

• speed up

• slow down

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NGSS.MS-PS2-2