Lesson 3.1 Speed

UNIT 3 - MOTION

3.1 Speed

Lesson Objectives;

Use pages 158-159 to complete lesson 3.1.

At the end of this lesson, you should be able to;

• Calculate speed

• Describe relative motion

Multiple Choice

Page 158 fill in the blanks;

Speed is a measure of how ___ somthing travels in a particular ___

• fast, time

• far, time

• space, time

• quickly, time

Multiple Choice

Page 158; In science, you measure speed in;

• kilometers per hour

• meters per hour

• meters per second

• kilometers per second

Multiple Select

Page 158; Car speeds are measured in (select two answers)

• meters per second

• kilometers per hour

• miles per hour

• meters per hour

Multiple Choice

Page 158 True or false;

To calculate the speed of an object, you need to measure the time it takes to travel between two points.

• TRUE

• FALSE

Multiple Choice

Which of the following are correct ways to calculate speed?

Speed =

• Distance X Time

• Distance / Time

• Time / Distance

Multiple Choice

Which of the following is a unit of time?

• seconds

• miles

• m/s

• km

Multiple Choice

What is the standard unit of speed used in science?

• m/s

• Kph

• mph

• Km/s

Multiple Choice

Which of the following is a unit of distance ?

• miles/hr

• miles

• seconds

• minutes

Multiple Choice

Page 159; In a marathon, athletes run at the same constant speed throughout the race

• YES

• NO WAY

• MAYBE

Multiple Choice

All of the following are units of speed except:

• Km/hr

• Km

• Kilometer per hour

• Kilometer/Hour

Multiple Choice

Page 159; A marathon runners speed after the whole event is referred to as;

• Average Speed

• Instantaneous speed

• Normal speed

• Walking pace

Multiple Select

Page 159; What is instantaneous speed?

• The speed at an instant

• The speed at any given point in time

• The speed on the speedometer of a car

• The highest speed

Multiple Choice

Apply; True or false;

During a race, some instantaneous speed values will be higher than the runners average speed

• TRUE

• FALSE

Multiple Choice

Page 159; Average speed =

• (total distance) ÷ (total time)

• (total distance) x (total time)

• (total time) ÷ (total distance)

• Speed x time

Multiple Choice

What are you calculating when you divide the distance an object travelled by the amount of time it took for that object to travel that distance?

• velocity

• slope

• motion

• speed

Multiple Choice

Distance ÷ Time =

• velocity

• speed

• acceleration

• direction

Multiple Choice

We know that speed = distance ÷ time

What is;

Distance ÷ Speed =

• Distance

• Speed

• Time

Multiple Choice

We know that speed = distance ÷ time

What is;

Time x Speed =

• Distance

• Speed

• Time

Multiple Choice

total distance travelled divided by total time is...

• speed

• velocity

• acceleration

• average speed

Multiple Choice

The speedometer in a car gives the car's _________ speed.

• average

• instantaneous

• speed

• velocity

Multiple Choice

The SI unit for speed is_______.

• meters per second

• miles per hour

• miles per second

• meters per hour

Multiple Choice

The speed at which an object is moving at a given instant in time.

• speed

• Instantaneous speed

• Average speed

• final speed

Multiple Choice

A jet airliner flies 4100 km from New York City to San Francisco in 4.25 hours.  What is its average speed?

• 964.71 km/hr

• 96.47 km/hr

• 17,425 km/hr

• 174.25 km/hr

Multiple Choice

How long would it take a bus traveling at 50 km/h to travel 125 km?

• 6,250 hours

• 2.5 km

• 2.5 hours

• 6,250 km

Multiple Choice

Avery swims 1000 m in 30 minutes.  What is her average speed?

• 33.33 m/min

• 300 m/min

• 30 m/min

• 3 m/min

Multiple Choice

Akela rode her bike 48 km for 3 hours, she rested for 30 minutes and then rode another 24 km for 1 hours. What was the total time she spend on her bike ride? (Remember, stops count!)

• 24 hours

• 48 hours

• 4 hours

• 4.5 hours

Multiple Choice

Grace drove her mom's car for 70 km and it took her 120 minutes.  What was her average speed in km/hr?

• .58 km/min

• 35 km/hr

• 8400 km/min

• 3.5 km/hr

Multiple Choice

Page 159; Relative motion;

Relative motion means how fast one thing is travelling compared to another

• TRUE

• FALSE

Fill in the Blanks

Page 159; Relative speed;

Fill in the blanks; If two cars are moving at the same speed in the same direction, their relative speed is

Multiple Choice

If two cars are moving at 30mph towards each other, their relative speed is;

• 30 mph

• 0 mph

• 60 mph

Multiple Choice

the speed relative to an observer

• average speed

• relative speed

• regular speed

• motion

Multiple Choice

What is Relative?

• Relative means opposite

• Relative means in comparison of something else

Multiple Choice

You are in a car moving at 50mph. Your friend is in a next to you also moving at 50mph.

How will you observe your friend's motion?

• They will appear to be moving faster than you

• They will appear to be moving slower than you

• They will appear as if they are not moving

• They will seem far away

Multiple Choice

Calculate these 3 car's speeds, then rank them in order of fastest to slowest, with 3 being the fastest car and 1 the slowest car.
Car A- distance: 4 meters, time: 2 sec
Car B- distance: 2 meters, time: 2 sec
Car C- distance: 8 meters, time: 2 sec

• Car A= 1 Car B= 2 Car C = 3

• Car A = 2 Car B= 1 Car C= 3

• Car A= 3 Car B= 1 Car C = 2

• Car A = 3 Car B= 2 Car C= 1