Force Motion Energy STAAR Review Pfeffer

A motorcycle traveling 35 mi/hr slows as it approaches a stop sign. This is an example of _____ (8.6B)

• acceleration

• distance

• speed

• velocity

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

Tags

NGSS.MS-PS2-2

A bike racer travels 17 mi/hr in a South direction. This is an example of -- (8.6B)

• distance

• speed

• velocity

• acceleration

Tags

NGSS.MS-PS3-1

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.

Tags

NGSS.MS-PS2-1

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

• a

• b

• c

• d

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NGSS.MS-PS3-1

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

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

• soccer ball

• tennis ball

• marble

• they are all the same

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

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Javelinas need strong leg muscles to help provide enough force for them to accelerate to high speeds. This fast movement can help Javelinas escape from predators and reach the safety of the pack. If a Javelina runs 42 meters in 6 seconds, what is its average speed? (6.8C)

• 6 m/s

• 7 m/s

• 48 m/s

• 252 m/s

Tags

NGSS.MS-PS3-1