When an object’s distance from another object is changing,

• • it is in motion.

• it has a high velocity.

• it is accelerating.

The basic SI unit of length is the

• foot

• meter

• inch

Speed equals distance divided by

• motion

• velocity

• time

When you know both the speed and direction of an object’s motion, you know the

• acceleration of the object.

• distance the object has traveled.

• velocity of the object.

Tags

NGSS.MS-PS3-1

You can show the motion of an object on a line graph in which you plot distance against

• time

• direction

• velocity

Tags

NGSS.MS-PS3-1

The steepness of a line on a graph is called the

• rise

• run

• slope

The rate at which velocity changes is called

• instantaneous speed

• direction

• acceleration

Which of these is an example of deceleration?

• a bird taking off for flight

• a car approaching a red light

• an airplane following a straight flight path

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

To determine the acceleration rate of an object, you must calculate the change in speed during each unit of

• velocity.

• time.

• motion.

If speed is measured in kilometers per hour and time is measured in hours, the unit of acceleration is

• kilometers per hour.

• kilometers per hour per hour.

• kilometers.