cua 8 corrections

Some students were investigating the speed of a toy car they built. They performed two trials and recorded their date in the table below.

What was the average speed of the toy car during the two trials to the nearest tenth of a m/s?

• 0.9 m/s

• 0.7 m/s

• 1 m/s

• 1.3 m/s

Tags

NGSS.MS-PS3-1

The graph represents four runners in a race. Which line on the graph represents the runner who ran the entire race at a constant speed?

• a

• b

• c

• d

Tags

NGSS.MS-PS3-1

James and his dad drove from Houston  to Dallas which is 240 km away.  It took them four hours to get there. Calculate their speed.

• 50 km/hr

• 60 km/hr

• 70 km/hr

• 30 km/hr

Tags

NGSS.MS-PS3-1

A golfer collected data on the distance a golf cart traveled in a straight line and plotted it on a graph. Select the TWO areas on the graph where the golf cart is not in motion.

• a

• b

• c

• d

• e

Tags

NGSS.MS-PS3-1

A horse trainer records the distance a horse travels during three different trials. 

Horse's Traveling Times and Distances

 

What is the horse's average speed in kilometers per minute?

Answer explanation

0.45

A car increases its speed from 0 m/s to 10 m/s as it travels for 3 minutes. The car then travels at a constant speed of 10 m/s for 2 more minutes and then increases its speed from 10 m/s to 20 m/s for 3 more minutes.  Which of the following graphs best represents the car's motion during this 8-minute period?

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Tags

NGSS.MS-PS3-1

A student kicks a soccer ball three times. Another student records the distance, the amount of time the ball travels, and the average speed in the table shown below.How many seconds did it take for the ball to travel 30 m during Kick 3?

• 0.5 s

• 1.0 s

• 1.5 s

• 2.0 s

Tags

NGSS.MS-PS3-1

The speed of an object over time is shown in the graph.

 

 

Which table describes the object’s motion?

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Tags

NGSS.MS-PS3-1

A person collected data on the distance a dog ran in a straight line and plotted it on a graph.Which of these describes the dog’s motion on this graph? Select THREE answer choices below.

• The dog moved toward the starting point at a speed of 3 m/s between 7 s and 12 s.

• The dog moved 24 m away from the starting point between 2 s and 5 s.

• The dog moved 17 m toward the starting point between 8 s and 10 s.

• The dog was at rest between 5 s and 7 s.

The distance a snail travels over time is shown in the graph.

Which table shows the average speed of the snail at different time intervals?

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• 

Tags

NGSS.MS-PS3-1