Unit 5 Review 24-25

A student threw a paper airplane across the classroom. The path the plane followed is shown in the diagram.

Which of these conclusions best describes why the plane traveled in a crooked path instead of a straight line?

• Air currents and gravity applied changing and unbalanced forces to the airplane.

• Objects with irregular shapes cannot travel in straight lines.

• The upward force of the air on the plane was greater than the downward force of gravity.

• Once the paper airplane was in motion, it continued moving in the same direction because the forces were balanced.

Tags

NGSS.MS-PS2-2

The space shuttle, Intrepid, was powered by an engine created a net force of 30,000 N. The Intrepid has a mass of 2,750 kg. Which expression can be used to find the space shuttle’s acceleration with this data?

• 2,750 kg X 30,000 N

•  30,000 N / 2,750 kg

• 2,750 kg + 30,000 N

•    2,750 kg /30,000 N

Tags

NGSS.MS-PS2-2

The graph below shows the average speed of Sam as he went home from school. Which of the following statements would best explain Sam’s actions during his trip home?

• Sam waited around after school for his friend, and then they ran home together.

• Sam ran all the way from school to home going the same constant speed and never stopping.

• Sam ran for a long time, then slowed down to walk the rest of his trip. Once he got home, he sat down on the couch.

• Sam walked for a while, stopped to sit on a bench in the park, and then ran the rest of the way home.

Tags

NGSS.MS-PS3-1

A student uses a baseball bat to hit a resting 0.145 kg baseball. The bat exerts a force of 139.2 N, which causes the ball to begin moving. What is the acceleration of the ball when it begins to move?

• 
  0.145 m/s²

• 20.184 m/s²

• 960 m/s²

• 139.345 m/s²

Tags

NGSS.MS-PS2-2

The force causes the lawnmower to move at a constant speed of 2 m/s. What will happen if the force is changed to 12 N?

• The speed of the lawnmower will increase to 3 m/s.

• The speed of the lawnmower will decrease.

• The speed of the lawnmower will not change.

• The speed of the lawnmower will move at a constant speed of 6 m/s.

Tags

NGSS.MS-PS2-2

A toy car has a mass of 0.14 kg. Two students push the car with an unknown amount of force and measured the car’s acceleration at 3.8 m/s². Which expression can be used to find the force used to push the toy car with this data?

• 0.14 kg/3.8 m/s²

• 0.14 kg + 3.8 m/s²

• 3.8 m/s² / 0.14 kg

• 0.14 kg X 3.8 m/s²

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

The diagram below shows a toboggan moving along a smooth, frictionless track.

In which sections of the track will the sled experience balanced forces?

• Sections 2 and 4

• Sections 1 and 2

• Sections 1 and 3

• Sections 3 and 4

Tags

NGSS.MS-PS2-2

Consider the lines on the time-distance graph at the top. The lines represent the speed of two runners racing on the school track.  Which statement is false regarding the information provided by the graph?

• Runner A had the fastest speed.

• Both runners traveled the same distance.

• The runners traveled for the same amount of time.

• Runner B traveled half as far as Runner A in 4 seconds.

Tags

NGSS.MS-PS3-1

A car travels 10 km in .25 hrs. What is the average speed of the car?

• 25 km/h

• 20 km/h

• 45 km/h

• 40 km/h

Sally was trying to calculate the speed of the hummingbirds feeding outside her window. Sally measured the distance from one feeder to the next, 24 meters. Then she sat and timed how long it took a hummingbird to fly from one feeder to the next. She timed 10 trials and calculated the average time, 3 seconds. What was the average speed of the hummingbird flying from one feeder to the other?

• 6 m/s

• 8 m/s

• 24 m/s

• 72 m/s

Tags

NGSS.MS-PS3-1