Physics Motion Quiz 06

The position versus time graph is of an ant walking along a road. What is the total distance traveled in centimeters? (Write the number without units.)

Answer explanation

The total distance traveled is calculated by considering the absolute changes in position. Since the graph shows the ant returning to its starting point, the total distance is 0 cm.

The position versus time graph is of an ant walking along a road. What is the net displacement traveled in centimeters? (Write the number without units.)

Answer explanation

The net displacement is the difference between the final and initial positions. If the ant returns to its starting point, the displacement is 0 cm, despite any distance traveled. Thus, the correct answer is 0.

What is the object’s average speed for the entire motion shown?

• 0.5 cm/s

• 0.8 cm/s

• 0.9 cm/s

• 2.0 cm/s

• Can’t be determined because the direction changes.

Answer explanation

To find average speed, divide total distance by total time. If the object travels a total distance of 9 cm in 10 seconds, the average speed is 0.9 cm/s. Thus, the correct answer is 0.9 cm/s.

Tags

NGSS.MS-PS3-1

What is the object’s average velocity for the entire motion shown?

• 0.5 cm/s

• 0.8 cm/s

• 0.9 cm/s

• 2.0 cm/s

• None of the other choices because the velocity is negative.

Answer explanation

The average velocity is calculated as total displacement divided by total time. If the object moves a total distance of 1 cm in 2 seconds, the average velocity is 0.5 cm/s, making this the correct choice.

Tags

NGSS.MS-PS3-1

Which statement best describes the motions of A and B represented in the graph shown?

• Object A has greater speed than object B from 6 to 7 seconds.

• Object B has constant speed from 4 to 6 seconds.

• A has greater average speed.

• B has greater average speed.

• A and B have the same average speed.

Answer explanation

The graph indicates that both A and B cover the same distance over their respective time intervals, resulting in equal average speeds. Thus, the correct statement is that A and B have the same average speed.

Tags

NGSS.MS-PS3-1

The Position vs. Time graph represents the motion of a toy car. What is the speed of the car at t = 2 seconds?

• 2.0 cm/s

• 3.0 cm/s

• -0.5 cm/s

• -2.0 cm/s

• -3.0 cm/s

Answer explanation

At t = 2 seconds, the slope of the Position vs. Time graph indicates the speed. The graph shows a rise of 6 cm over a run of 2 seconds, giving a speed of 3.0 cm/s, which is the correct answer.

Tags

NGSS.MS-PS3-1

A Position vs. Time graph of a car is shown. Which statement best describes the motion of the car?

• The car is moving with a constant speed before it slows down to a stop.

• The car starts from rest before moving and then eventually stopping.

• The car is speeding up then moving with a constant speed.

• The car is moving up a hill that gradually flattens out.

Answer explanation

The graph shows a straight line indicating constant speed, followed by a curve that slopes downwards, indicating the car is slowing down to a stop. Thus, the correct choice is that the car moves with constant speed before stopping.

What statement describes the object's motion at the point indicated by the dot on the graph?

• The object is not moving.

• The object is moving at a constant speed.

• The object is moving downhill.

• The object is slowing down.

Answer explanation

The graph indicates a straight line, which means the object is moving at a constant speed. There are no changes in slope, so it is not slowing down or moving downhill.

Tags

NGSS.MS-PS3-1

What is the position of the object that is indicated by the dot on the graph?

• 1 meter

• 2 meters

• 3 meters

• 4 meters

Answer explanation

The dot on the graph indicates the position of the object at 3 meters, which is the correct answer among the choices provided.

How far did the object travel during the 8 seconds?

• 2 meters

• 3 meters

• 4 meters

• 5 meters

• 6 meters

Answer explanation

The object traveled at a constant speed. If it covered 4 meters in 8 seconds, this indicates a speed of 0.5 meters per second, making 4 meters the correct distance traveled during that time.