Vocabulary
What is the definition of speed?
(How far something travels in a given amount of time)
Give an example of constant speed.
(Car on cruise control)
What is the formula for average speed?
(Average speed = total distance ÷ total time)
Give a real-life example of speed.
(A jogger running 5 m/s)
What two things does velocity describe?
(Speed and direction)
What is constant speed?
(Speed that does not change over time)
Give an example of changing speed.
(Car stopping at a red light)
A cyclist travels 40 km in 2 hours. What is their average speed?
(20 km/h)
Give a real-life example of velocity.
(A car traveling 60 mph north)
When can speed stay the same but velocity change?
(When direction changes)
What is instantaneous speed?
(The speed at a single moment in time)
Explain how speed and velocity are different.
(Velocity includes direction)
Why is average speed useful?
(It summarizes speed over an entire trip)
Give an example where speed is constant but velocity changes. (Car going around a curve)
(Car going around a curve)
Why is it important to specify direction with velocity?
(Because speed alone isn’t enough)
What is average speed?
(Total distance divided by total time)
True or False: Instantaneous speed is measured over a whole trip.
False
A runner covers 300 m in 30 s. What is their average speed?
(10 m/s)
Why does a car driving in a circle at constant speed still have changing velocity?
(Direction is changing)
True or False: Speed can be zero while velocity is nonzero.
False
What is velocity?
(Speed with a direction)
Name two ways velocity can change.
(Speed change or direction change)
How is average speed different from instantaneous speed?
(Average covers whole trip, instantaneous is one moment)
Name a job or sport where knowing velocity is important.
(Pilot, race car driver, etc.)
Explain why average speed can be lower than instantaneous speed on a trip.
(Stops or slower parts bring the average down)