Acceleration

Which car(s) accelerated?

• CAR A

• CAR B

• CAR C

• CAR D

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-1

Which car(s) had the greatest acceleration?

• CAR A

• CAR B

• CAR C

• CAR D

Tags

NGSS.MS-PS2-2

Two balls that look the same, but have different masses are dropped at the same time from the top of the ladder. Which ball will hit the ground first?

• The ball with the most mass because it has less air resistance slowing the paper.

• The ball with the most mass because it has more air resistance slowing the paper.

• Both pieces of paper will hit the ground at the same time because the acceleration due to gravity is a constant (Stays the same).

• More information is needed

Tags

NGSS.MS-PS2-4

A group of students dropped a ball and used a video recording to measure the distance and time for each frame. They completed this data table using their results. Was the acceleration for the ball constant?

• Yes. The acceleration was 0.03s for each frame.

• Yes. The acceleration was 8.9 m/s/s for frames 5 and 6.

• No. The acceleration was 8.9 m/s/s for frames 5 and 6, but was different for every other frame.

• No. Frame 8 was accelerating while the others were decelerating.

Tags

NGSS.MS-PS2-2

A group of students dropped a ball and used a video recording to measure the distance and time for each frame. They completed this data table using their results.

Would you expect to see a pattern in which the acceleration increases in each frame?

• Yes. The acceleration was 0.03s for each frame.

• Yes. Gravity on Earth is not constant.

• No. Gravity on Earth is, for the most part, constant.

• No. Only frames 4 and 5 are constant.

Tags

NGSS.HS-PS2-1

A group of students dropped a ball and used a video recording to measure the distance and time for each frame. They completed this data table using their results.

What is the average acceleration of the student's data in m/s²?

• 6.85 m/s²

• 5.14 m/s²

• 47.6m/s²

• 13.3 m/s²

Tags

NGSS.HS-PS2-1

Why might you want to exclude the acceleration to frame 3?

• The ball moved such a small amount, it is hard to measuere

• The ball is moving so fast, it is a large blur and is difficult to determine the middle of the ball.

• If the ball impacted with the surface, it might be decelerating.

• It is never OK to exclude data

Tags

NGSS.MS-PS3-1

A car is moving 1m/s. 10 seconds later, the car is moving 41 m/s. What is the acceleration of the car?

• 40m/s/s

• 4 m/s/s

• 31 m/s/s

• 51 m/s/s

Tags

NGSS.MS-PS2-2

Which equation would you use to find the acceleration of an automobile whose speed decreases from 100 m/s to 5 m/s in 20s?

• (100m/s-5m/s) / 20s = 4.75m/s²

• (100m/s+5m/s) / 20s = 5.25m/s²

• (5m/s-100m/s) / 20s = -4.75m/s²

• (5m/s-100m/s) = -95m/s

Tags

NGSS.HS-PS2-1

Two students noted that a horse's acceleration was -30km/s². Student 1 said, "That can't be right. You can't have a negative acceleration." What would you tell student 1?

• You can have negative acceleration. It means the horse's speed in increasing.

• You can have negative acceleration. It means the horse's speed is decreasing.

• They must have put the numbers into the calculator wrong.

• They mixed up the initial and final velocities.