Motion Graphs

Motion Graphs

​Instructions

Watch the following video sections and take notes in your binder. Your grade will consist of your notes and the questions after each section of the video. The notes will be graded as part of your binder check on Friday.

Position vs Time Graphs

Position graphs can be used to extract 2 different motion concepts:
1. The position for an object at any given time (simply reading the values of the graph)
2. The velocity of an object at any given time (the value of the slope of the plotted line represents the velocity)

Multiple Choice

What does the slope of a position-time graph represent?

• Distance

• Displacement

• Velocity

• Acceleration

Multiple Choice

On a distance vs. time graph, the steeper the slope _____

• the slower the speed
• the faster the speed
• less acceleration
• greater acceleration

Multiple Choice

On a position-time graph, the position (distance) is plotted on the ____ axis.

• x

• y

Velocity vs Time Graphs

Velocity graphs can be used to extract 3 different motion concepts:
1. The velocity for an object at any given time (simply reading the values of the graph)
2. The acceleration of an object at any given time (the value of the slope of the plotted line represents the acceleration in this type of graph)
3. The displacement of the object ( displacement can be calculated by calculating the area of any time interval of this plotted line. )

Multiple Choice

Describe the motion of an object given by the velocity vs time graph.

• It is speeding up.

• it is not moving.

• It has a constant speed.

• It is slowing down.

Multiple Choice

Describe the motion of an object given by the velocity vs time graph.

• It is speeding up.

• it is not moving.

• It has a constant speed.

• It is slowing down.

Multiple Choice

To determine how far an object travels using a Velocity-time graph I should...

• Look at the vertical axis for that time

• Determine the area between the graph & the x axis up to that time

• See whether the graph is above or below the x axis at that time

• Solve for the slope of the graph at that time

Multiple Choice

What does the slope of a velocity-time graph represent?

• Distance

• Displacement

• Velocity

• Acceleration

Acceleration vs Time Graphs

Acceleration graphs can be used to extract 2 different motion concepts:
1. The acceleration for an object at any given time (simply reading the values of the graph)
2. The jerk or jolt of an object at any given time (the value of the slope of the plotted line represents jerk or jolt)

Multiple Choice

What does the slope of an acceleration - time graph represent?

• Jerk or Jolt

• Acceleration

• Average Velocity

• Displacement

Multiple Choice

What does the area of an acceleration - time graph represent?

• Jerk or Jolt

• Acceleration

• Average Velocity

• Displacement

Multiple Choice

Which one of the following graphs describes an object that is moving at a constant speed to the left (- direction)?

Multiple Choice

Which one of the following graphs describes an object that is at rest?

Multiple Choice

Which one of the following graphs describes an object that is moving at a constant speed to the right (+ direction)?

Multiple Choice

Rank the following objects from slowest to fastest.

• A-B-C

• B-A-C

• C-B-A

• A-C-B

• C-A-B

Multiple Choice

• not moving

• velocity is increasing

• velocity is decreasing

• constant velocity

Multiple Choice

Describe the motion of an object given by this Position-time graph.

• slowing down, moving backward

• slowing down, moving forward (away)

• speeding up, moving backward

• speeding up, moving forward

The following questions are a mixed practice set of all the notes you just covered. It is very inportant that you first identify the graph to know how to determine the unknown quantities. For example, in order to calculate velocity you can either:
1. Calculate the slope of a position vs. time graph.
2. Read the values on a velocity vs. time graph.
3. Calculate the area of an acceleration vs time graph.

Instructions

Mixed Practice

Multiple Choice

What do we compare an object's position to when we want to see if it has moved?

• reference point

• motion

• position

• displacement

Multiple Choice

What is the average velocity of this object?

• +0.5 m/s

• -0.5 m/s

• +2 m/s

• -2 m/s

Match

Match the motion terms to their definitions.

• Distance

• Displacement

• Speed

The total amount an object moves.

The difference from where an object starts to where it ends.

How far an object moves per unit of time.

• The total amount an object moves.

• The difference from where an object starts to where it ends.

• How far an object moves per unit of time.

Match

Match the following graphs to the right description.

Speeding up

No acceleration (constant velocity)

Slowing down

• Speeding up

• No acceleration (constant velocity)

• Slowing down

Multiple Choice

Calculate the displacement traveled in section B. Hint: Remember the area under a v-t graph = displacement!

• 150 m

• 50 m

• 100 m

• 200 m

Multiple Choice

Calculate the displacement traveled in section C. Hint: Remember the area under a v-t graph = displacement and you will need to use TWO shapes!

• 200 m

• 100 m

• 50 m

• 400 m

Multiple Choice

What is the rate of acceleration during the first line segment? (slope between 0 - 10 sec)

• 0 m/s²

• 2.7 m/s²

• 6 m/s²

• - 4 m/s²

Multiple Choice

What is the rate of acceleration during the 3rd line segment? (slope between 15 - 40 sec)

• 0 m/s²

• 2.7 m/s²

• 6 m/s²

• - 4 m/s²