Force Motion Energy STAAR Review

In the picture above, two teams of students are playing tug-of-war. Each team is pulling in the opposite direction, but both teams are moving in the same direction. Which of the following best describes the forces in this situation? (8.6A)

• The forces are balanced and the net force is zero.

• The forces are balanced and Team A is exerting a greater force.

• The forces are unbalanced and Team A’s force is greater.

• The forces are unbalanced and Team B’s force is greater

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When the air is release from a balloon, the air moves out one end and the balloon moves in the other direction. Which statement does this situation best illustrate? (8.6C)

• What goes up must come down.

• For every action there is an equal and opposite reaction.

• The shape and size of an object affect air resistance.

• The acceleration due to Earth’s gravity is 9.8 m/s2.

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A spring scale is used to pull each of the four objects. Based on the information provided, which object experiences the greatest acceleration when pulled with 8 N of force? (8.6A)

• Object R

• Object S

• Object T

• Object U

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NGSS.MS-PS2-2

According to Newton's 1st Law of Inertia, a ball that is rolling across the ground will (8.6C)

• Continue to roll indefinitely because there is no force acting on it

• Continue to roll unless there is an opposing force acting on it

• Will stop unless there is an opposing force acting on it

• Continue to roll regardless of the forces acting on it

Force can be described as a ________________________ on an object.

• tug or slap

• push or pull

• strain

• burn and turn

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NGSS.MS-PS2-1

Match the following

• force

•  is the invisible force that pulls objects towards one another

• energy

• the force that opposes motion

• gravity

• is the ability to do work or cause change.

• friction

• is any push or pull that causes something to move

• inertia

• objects in motion stay in motion, objects at rest, stay at rest, unless acted on by a force. 

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Which of the following is necessary to get something moving?

• Resistance.

• Wedge.

• Force.

• Screw.

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NGSS.MS-PS2-2

Examine the table. Which of the objects is producing the greatest force? (8.6C)

• soccer ball

• tennis ball

• marble

• they are all the same

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NGSS.MS-PS2-2

Two forces are applied to a 17 kg box as shown. The box is on a smooth surface. Which statement best describes the net force and direction the box will move? (8.6)

• 7 N to the right

• 7 N to the left

• 53 N to the right

• 70 N to the right

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Which graph best represents a car traveling down the freeway at a constant speed? (6.8D)

• a

• b

• c

• d

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