Lesson 3.1 Speed

Page 158 fill in the blanks;

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

Page 158; In science, you measure speed in;

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

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.

Which of the following are correct ways to calculate speed?

Speed =

What is the standard unit of speed used in science?

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

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

Page 159; What is instantaneous speed?

Apply; True or false;

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

Page 159; Average speed =

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?

Distance ÷ Time =

We know that speed = distance ÷ time

What is;

Distance ÷ Speed =

We know that speed = distance ÷ time

What is;

Time x Speed =

total distance travelled divided by total time is...

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

The SI unit for speed is_______.

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

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!)

Page 159; Relative motion;

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

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

the speed relative to an observer

What is Relative?

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?