Science 8 STAAR Review: Physics Quiz

You are driving to your grandmother’s house for a family dinner. She lives on the other side of town, so you get on the highway and drive 60mph. It’s a very windy day, and the wind is blowing in the same direction you are driving. You look at the car’s speedometer to see how much faster the wind is making you go as it pushes the car from behind, but it still says 60mph. What kind of force was this wind?

• Balanced because the car’s motion did not change.

• Balanced because the car’s motion did change.

• Unbalanced because the car’s motion did not change.

• Unbalanced because the car’s motion did change.

Tags

NGSS.MS-PS2-2

Doug and Linda were playing tug of war. Doug pulled the rope with a force of 10N to the west. Linda pulled the rope with a force of 12N to the east. What was their net force and direction of motion?

• 22N east

• 2N east

• 22N west

• 2N west

Tags

NGSS.MS-PS2-2

What is the speed of object A at t =10s?

• 5 m/s

• 0.2 m/s

• 60 m/s

• 40 m/s

Tags

NGSS.MS-PS3-1

Which object did not have a constant speed during the first 50 seconds of their ride?

• A

• B

• C

Tags

NGSS.MS-PS3-1

What is the net force on the box?

• 3N

• 9N

• -3N

• 18N

Tags

NGSS.MS-PS2-2

Are these forces balanced or unbalanced?

• Balanced because the box’s motion did not change.

• Balanced because the box’s motion did change.

• Unbalanced because the box’s motion did not change.

• Unbalanced because the box’s motion did change.

Tags

NGSS.MS-PS2-2

Deep Space 1 was a spacecraft powered by a engine that gave off xenon particles to change velocity. It had a mass of 500kg. Which expression can be used to find the spacecraft's acceleration if its engine created a net force of 0.10N?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-2

A student used a video camera to record another student dropping a marble through water in a graduated cylinder. The students watched the video in slow motion and made the observations shown. During which part or parts of the marble's fall did the marble experience unbalanced forces?

• Part 1 only

• Parts 1 and 2 only

• Part 3 only

• Parts 2 and 3 only

Tags

NGSS.MS-PS2-2