Motion, Speed and Distance vs. Time Graphs

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​FORCES

Position

Position is where something is located.

Motion

Motion is a change in position.

Friction

• Friction is a force that appears when two objects are in contact (touching)

• When the boy pushes the box, friction pushes back in the opposite direction

• The box will only move if the pushing force is greater than the friction force

Multiple Choice

___________ is a measurement of how fast something is moving.

• Slow

• Speed

• Gravity

Multiple Choice

An automobile you are riding in suddenly stops, but you continue to go forward.

• Newton's
  1st
  Law of Motion
• Newton's
  2nd
  Law of Motion
• Newton's
  3rd
  Law of Motion

Multiple Choice

Forces must be ______ in order for a change in motion to occur.

• balanced

• equal

• unbalanced

SPEED

How is motion measured?

How do you know how fast or

slow something is?

​What is Speed?

​What is Speed? | Motion and Time | Don't Memorise

WHAT IS FRICTION?

Friction is a force that resists the

motion of two surfaces that are
touching.

When a moving object comes in contact with another object, friction is the opposing force that slows or
stops the moving object.

Speed

In general, speed measures the distance
traveled in a given amount of time, however speed is not constant.


- For example, when you are running a race you may start out slower to pace yourself, but as you near the finish line you speed up.

Different Speeds

One driver may drive slower or faster than the other driver.

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Multiple Choice

What is the concept of speed?

• The time it takes for an object to reach a certain distance
• The rate at which an object changes its position
• The force exerted by an object in motion
• The distance covered by an object in a given time

Average Speed

A measurement of the average speed an object traveled takes into account all the variations in speed that may happen during a journey.

Average Speed

The higher an average speed number is, the faster that object completed its journey.

UNIFORM AND NON UNIFORM MOTION

• When an object covers equal distances in equal intervals of time it is in uniform motion.

• When an object covers unequal distances in equal intervals of time it is said to be in non-uniform motion.

Multiple Choice

Which best describes this motion in the graph?

• stopped, walking, running home

• running, walking, stopped, walking home

• walking, stopped, walking, running home

• walking, running, running, stopped

Multiple Choice

What does uniform speed refer to?

• An object changing direction
• An object moving with varying speeds and changing direction
• An object moving in a straight line at a constant speed
• An object moving at varying speeds

Multiple Choice

Which of the following is an example of uniform motion?

• A car that speeds up or slows down during its journey
• A person running in a straight path at a consistent pace
• A person walking at different speeds
• A car driving at a steady speed on a highway

Multiple Choice

Which of the following is an example of non-uniform motion?

• A car traveling at a constant speed of 60 miles per hour
• A person walking on a treadmill at a steady pace of 4 miles per hour
• A roller coaster speeding up and slowing down at different sections of the track
• A pendulum swinging back and forth with the same speed.

TIME AND SPEED

• Time is the duration of an event that is expressed in seconds. Most physical phenomena occur with respect to time. It is a scalar quantity.

• Speed is the rate of change of distance. If a body covers a certain distance in a certain amount of time, its speed is given

• SPEED = DISTANCE / TIME

How to Calculate

Average Speed

Multiple Choice

Which of the following is/are NOT a unit measurement of speed?

• m

• m/s

• km/h

• cm/min

Multiple Choice

Karding walked 450 m in 3.00 minutes.

Find his speed in m/min.

• 150m

• 450m/min

• 150m/min

• 200m/mispeed

Multiple Choice

Tofu took 2.1 h to travel 16 km from The Raya School to Quezon City Circle. She took another 1.0 h to travel 20 km to Pinto Art Museum.

What was the average speed for the whole journey?

• 11.6 km/h

• 12 km/h

• 7.6 km/h

• 20 km/h

Multiple Choice

A German Shepherd can run at a speed of 48 km/h.

How far can it travel in 6.5 hours?

• 312 km

• 3.1 x 10² km

• 7.4 km

• 312 km/h

Multiple Choice

Turbo crawled from plant A to plant B. His speed was 6.2 m/min. Plant A is 24 m away from plant B. How many minutes did it take for him to reach plant B?

• 24 minutes

• 3.9 minutes

• 4 minutes

• 3 minutes

​See Gizmos on Graphing Skills (on the next pages).

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​Gizmos on Inturpreting graphs - see next slides

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Multiple Choice

According to the graph how far does the person travel in the first 5 seconds?

• 2 m
• 10 m
• 0 m
• 5 m

Multiple Choice

What distance did the object travel in 3 seconds?

• 10 m

• 20 m

• 30 m

• 50 m

Multiple Choice

Which segment shows the faster speed?

• A to B

• C to D

• B to C

• E to F

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Multiple Choice

What is the objects instantaneous speed at t = 7 seconds?

• 25 m/s

• 10 m/s

• 5 m/s

• 0 m/s

Multiple Choice

Which graph shows a car that is moving at a constant velocity?

• A
• B
• C
• none of them

Multiple Choice

Which runner won the race?

• Albert
• Bob
• Charlie

Multiple Choice

Which runner stopped for a rest?

• Albert
• Bob
• Charlie

Multiple Choice

What is happening at C?

• Stationary

• Accelerating

• Fast steady speed; moving away from the starting position

• Slower steady speed; moving away from the starting position

Multiple Choice

What is happening at D?

• Stationary

• Accelerating

• Fast steady speed; moving away from the starting position

• Slower steady speed; moving away from the starting position

Multiple Choice

A student walks 2.0 km in a time of 30 minutes. The student then stop for 15 minutes to eat a snack then travels 1.0 km in 15 minutes.

Multiple Choice

What is the total distance traveled?

• 20 m

• 30 m

• 40 m

• 50 m

​Intro to Slope

There are 4 types of slopes to look out for

NOTE: Slope is also sometimes referred to as the "rate of change"

Main Ideas

Refresher

coordinate plane: composed of the x-axis (horizontal) and y-axis (vertical)

​

Ordered pair: follows the format (x,y) and used for graphing

​​

TIP: think of the negative and positive signs as directions! Negative means down or left, while positive means up or right

Today's Vocab:

Slope: how we measure the steepness of a line. The vertical (rise) over the horizontal (run) distance from one point to another

​

Rise: The movement up or down from one point to another point on the line

​

Run: The movement left or right from one point to another point on the line

​The greater the slope, the greater the speed.

Fill in the Blanks

Multiple Select

While jogging, student 1 runs the dashed course and student 2 runs the solid course. Both run from A to B in 25 minutes. Select all that are true.

• Student 1 ran a greater distance

• Student 1 ran a greater displacement

• Student 1 had a greater average velocity

• The students had the same average velocity

Multiple Choice

In which graph are the runners running at the same speed?

How can I find the slope of a line if all I have are two ordered pairs?

How to find the slope:

• 1. choose two points on the line

• 2. find the change in y-values (rise). if you move up the change is positive & if you move down the change is negative

• 3. find the change in x-values (run). if you move right the change is positive & if you move left the change is negative

• 4. slope = rise / run

Multiple Choice

What is the speed of this object?

• 10 m/s

• 20 m/s

• 50 m/s

• Can't tell, the speed is increasing

Multiple Choice

What is this graph showing?

• The object is moving away from starting point at a constant speed

• The object is moving back towards the starting point at a constant speed

• The object is increasing its velocity

• The object is decreasing its velocity

Multiple Choice

Calculate the slope of the line.

• 2 m/s

• 800 m/s

• 0.5 m/s

Multiple Choice

What is the speed of this object?

• 10 m/s

• 20 m/s

• 50 m/s

• Can't tell, the speed is increasing

Multiple Choice

Calculate the slope of the line.

• 0.15 m/s

• 1500 m/s

• 6.7 m/s

Multiple Choice

Calculate the slope of the line.

• 2500 m/s

• 4 m/s

• 0.25 m/s