Force, Motion, Speed, and Velocity

How can you describe whether an object is in motion or not?

• If it changes in size

• If it changes its color

• If it changes its position relative to a reference point

How can you choose a reference point?

• The reference point must be changing position

• The reference point must be a moving car

• The reference point must be fixed

The SI unit for distance is

• m/s

• m

• s

The SI unit for measuring speed is the ---

• m/s

• m

• s

The speed of an object is defined as:

• Distance*Area

• Distance/Time

• Distance + Time

• Distance - Time

A car travels 12m in 6 seconds. Calculate the speed of this car.

• 20 m/s

• 0.2 m/s

• 2 m/s

• 18 m/s

To describe an object’s ---, you need to know both its speed and its direction

• shape

• direction

• motion

• velocity

--- is shown on the x-axis (the horizontal axis)

• Speed

• Distance

• Time

--- is shown on the y-axis (the vertical axis)

• Speed

• Distance

• Time

The slope of the line you obtain when you graph the distance versus the time represents the

• Speed

• Distance

• Time