Motion practice for assessment

A train engineer started the train from a standstill and sped up to 5 meters per second, she then rounded a corner at a constant speed. She then sped the train up to 10 meters per second on the next straightaway. Next, the train chugged around another bend at 10 m/sec, and then its speed slowed to 5 meters per second after coming out of the bend. Finally, the train reached the station, and the engineer applied the brakes and brought the engine to a stop. How many times did the train accelerate?

• 2

• 4

• 5

• 6

• A) It is constant during the trip.

• B) It is moving at a slow rate of speed.

• C) It is increasing throughout the trip.

• D) It varies at different times during the trip.

Tags

NGSS.MS-PS3-1

Sally and Maria were running around the track during PE. They were not happy and decided to stop and rest once they got to the bleachers. Based on the data in the graph, how would you describe the girls' speed while at PE?

• Their speed changed during the 25 minutes.

• The girls were always accelerating.

• Their speed was the same throughout the 25 minute class.

• Their speed was constantly increasing throughout the 25 minute class.

Tags

NGSS.MS-PS3-1

A dog named Rascal leaves his home and travels a short distance and then returns home. The graph shows his position as a function of time.

How does his velocity on his return trip compare to his velocity for the first 5 seconds?

• A) His velocity was slower when compared to the first 5 seconds.

• B)His velocity was positive on the return trip when compared to the first 5 seconds.

• C)His velocity on the return trip was twice as slow when compared to the first 5 seconds.

• D)His velocity on the return trip was twice as fast when compared to the first 5 seconds.

Tags

NGSS.MS-PS3-1

• A) Ball 1 - Ball 2 - Ball 3 - Ball 4

• B) Ball 1 - Ball 2 - Ball 4 - Ball 3

• C) Ball 2 - Ball 1 - Ball 4 - Ball 3

• D) Ball 4 - Ball 3 - Ball 2 - Ball 1

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

Ben and Jerry went for a drive. They decided to stop for a snack and have some ice cream. How long did they stop at the store to eat ice cream?

• A) 1/2 hour

• B) 1 hour

• C) 1 1/4 hours

• D )1 1/2 hours

Sara and Sam went for a two-hour drive. According to the graph, between .75 hours and 1.25 hours into their trip, they

• A) slowed down to a speed of 15km/hour.

• B)travelled at a constant rate of 30km/hour.

• C)were not moving since there was no change in position.

• D)turned around to go home but their speed remained constant.

Tags

NGSS.MS-PS3-1

Two people must have the same speed and velocity if

• A)they are walking toward each other at 2 m/s.

• B)they are walking away from each other at 2 m/s.

• C)they are jogging side by side at 5 m/s

• D)they are jogging to two different destinations

Bobby is riding his bike down the road at a speed of 10 miles per hour. Ahead of him, he sees another rider, moving in the same direction. Bobby is catching up with the rider ahead of him.

What is the estimated speed of the other rider?

• A) The same speed as Bobby's.

• B) Much faster than 10 mph.

• C) Slower than 10 mph.

• D) About 5 mph.

Consider this line graph that represents speed in meters/second. The X-axis is labelled in seconds; the Y-axis is labelled in meters. Imagine that the moving object stops after 2.5 seconds and stays stopped for 0.5 seconds. What would the line for that time interval look like on this graph?

• A)curve downward to Y equals 3

• B)straight, diagonal, negative slope to {14, 3}

• C)straight, diagonal, positive slope to {3, 15}

• D)straight and horizontal at Y equals 14, to {3, 14}

Tags

NGSS.MS-PS3-1