Physics Motion Quiz 07

What is the object's position at the point indicated by the dot on the graph?

• 1 meter

• 1.5 meters

• 2 meters

• 2.5 meters

• 3 meters

Answer explanation

The dot on the graph indicates the object's position at 3 meters. This is the correct choice as it directly corresponds to the value marked by the dot.

How far has the object traveled from the beginning of the motion (t = 0s) to the point indicated by the dot on the graph (t = 2s)?

• 1 meter

• 1.5 meters

• 2 meters

• 2.5 meters

• 3 meters

Answer explanation

The graph indicates that at t = 2s, the object has traveled 1 meter from the starting point at t = 0s. Therefore, the correct answer is 1 meter.

Tags

NGSS.MS-PS3-1

Which answer best describes the object's motion at the point indicated by the dot on the graph?

• The object is moving at a constant speed.

• The object is traveling uphill.

• The object is stopped at point indicated by the dot.

• The object is speeding up.

Answer explanation

The graph indicates a horizontal line at the point marked by the dot, which means the object's position is not changing over time. This implies that the object is moving at a constant speed.

Tags

NGSS.MS-PS3-1

How far did the object travel in the 16 seconds?

• 4 meters

• 6 meters

• 8 meters

• 10 meters

• 12 meters

Answer explanation

The object traveled at a constant speed. If it covered 6 meters in 16 seconds, this indicates a speed of 0.375 meters per second, confirming that 6 meters is the correct distance traveled.

The graph shows the distance traveled by two objects, A and B. Compared to the speed of object B, the speed of object A is:

• one half as great.

• the same.

• twice as great.

• three times as great.

Answer explanation

The graph indicates that object A travels three times the distance of object B in the same time period, which means the speed of object A is three times as great as that of object B.

Tags

NGSS.MS-PS3-1

Jimmy is running slowly in gym class, but then he notices Jenna watching him, so he speeds up to try to impress her. Which of the following graphs could represent his motion?

• Graphs 1 and 2

• Graphs 3 and 4

• Graphs 1 and 3

• Graphs 2 and 4

• other

Answer explanation

Graphs 3 and 4 show an initial slow speed followed by an increase in speed, which matches Jimmy's behavior of speeding up to impress Jenna. The other graphs do not accurately represent this change in motion.

Tags

NGSS.MS-PS3-1

Which Position vs. Time graph to the right would best represent the motion of a girl on a bike from the moment she sees a branch fall and brakes until the bike comes to rest?

• a)

• b)

• c)

• d)

Answer explanation

Graph c) best represents the motion as it shows a decrease in position over time, indicating the girl is slowing down and eventually comes to rest after braking when she sees the branch fall.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

How far did the object travel during the 12 seconds?

• 2 meters

• 4 meters

• 10 meters

• 20 meters

Answer explanation

The object traveled at a constant speed. If it covered 10 meters in 12 seconds, this indicates a speed of approximately 0.83 meters per second, confirming that the correct answer is 10 meters.

What was the object's change in position during the 12 seconds?

• 2 meters

• 4 meters

• 10 meters

• 20 meters

Answer explanation

The object's change in position is calculated by the distance it moved. Given the correct answer is 2 meters, this indicates that the object moved a total of 2 meters over the 12 seconds.

A radio-controlled car travels in one direction down a straight track. A part of the motion is shown in the top-view diagram. Every minute the car sprays a paint dot on the track to mark its position. How would you describe the motion of the car at t = 4 minutes?

• The car is slowing down.

• The car is speeding up.

• The car is stopped at the 20 meter mark.

• The car is moving at 5 m/min.

• The car is moving at 20 m/min.

Answer explanation

At t = 4 minutes, the distance between paint dots increases, indicating the car is covering more ground in the same time interval. This shows that the car is accelerating, hence it is speeding up.

Tags

NGSS.MS-PS3-1