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

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