Motion-Speed, Velocity, and Acceleration

Which car is accelerating?

• a car that is unmoving

• a car that rounds a curve at a constant speed

• a car that travels in straight line at a constant speed

• a car that is set to a constant speed of 60 miles per hour

Tags

NGSS.MS-PS2-2

This graph represents the motion of a car while driving over a short distance. Which statement accurately describes the motion of the car in this graph?

• It is going forwards slow, then it is going forwards fast.

• It is going forwards fast, then it is going forwards slowly.

• It is going backwards slow, then it is going backwards fast.

• It is going backwards fast, then it is going backwards slowly.

Tags

NGSS.MS-PS3-1

John and Caroline go out for a walk one day. This graph represents their distance from home.

Which statement accurately describes their walk?

• They walked quickly, then they were still, then they walked slowly.

• They walked forward fast, then they were still, then they walked backward slow.

• They walked in one direction, then they were still, then they walked in the opposite direction.

• They walked faster and faster until they walked at a constant rate, then they walked slower and slower.

Tags

NGSS.MS-PS3-1

John and Caroline go out for a drive one day. This graph represents the distance they traveled over time.

During what part of their drive are they not moving?

• From 0 to 0.75 hours

• From 1.25 to 2.0 hours

• From 0.75 to 1.25 hours

• They are moving the entire time.

The graph represents the distance a car travels over time while on the highway. Which statement about the car's trip is accurate?

• The car does not move over time.

• The car travels at a constant velocity.

• The car's velocity increases constantly over time.

• The car's velocity decreases constantly over time.

Tags

NGSS.MS-PS3-1

The graph represents the acceleration of two cars, Accel 1 and Accel 2, during a road trip. Which statement BEST describes the differences between the two cars' acceleration during the trip?

• Accel 1 accelerates throughout the entire trip; Accel 2 does not accelerate during the trip.

• Accel 1 rapidly accelerates and then stops; Accel 2 maintains a constant velocity during the trip.

• Accel 1 has a constant rate of acceleration; Accel 2 accelerates at different rates during the trip.

• Accel 1 accelerates for the first two-thirds of the trip; Accel 2 has a constant rate of acceleration.

Tags

NGSS.MS-PS3-1

Which point(s) on the graph indicate a change in acceleration?

• B only

• B and D

• A, C, and E

• A and E

Tags

NGSS.MS-PS3-1

Which graph illustrates constant speed?

• A

• B

• C

• D

Tags

NGSS.MS-PS3-1

At the county fair, Carrie and Sam climbed up on the carousel horses. Around and around they went; the horses also bobbed up and down. When they got off of the carousel, Carrie told Sam they had been accelerating during their ride. Sam disagreed; they had been moving at a constant speed. Whose response is fully correct, and why?

• Carrie is, because the carousel changed speed when it started and stopped.

• Sam is, because the horses never moved from their position on the carousel.

• Carrie is, because velocity includes speed plus direction, and both changed.

• Sam is, they did not accelerate since their speed remained constant for the ride.

Tags

NGSS.MS-PS2-4

During summer break, Jamie's family went camping in the mountains. There were no roads to their camp, 8 miles away, and it took them about 4.5 hours to reach the campsite on foot. Did Jamie's family stop to rest during the trip? How can you tell from the data?

• No. They continued moving but their speed varied.

• Yes. After 1.5 hours, there is no change in position for 30 minutes.

• No. They continued moving, although they also slowed down continuously during the trip.

• Not really. They did stop, but that was only when they reached the campsite at distance equals 0