Speed and Acceleration

Speed equals distance divided by

• time
• velocity
• size
• motion

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

• average speed of the object
• acceleration of the object
• distance the object has traveled
• velocity of the object

The rate at which velocity changes is called

• speed
• direction
• acceleration
• motion

Which of these is an example of negative acceleration (or deceleration)?

• a bird taking off for flight
• a baseball released by a pitcher
• a car approaching a red light
• an airplane following a straight flight path

A train that travels 100 kilometers in 4 hours is traveling at what average speed?

• 50 km/h
• 100 km/h
• 2 km/h
• 25 km/h

If a bicyclist travels 30 km in 2 hours, her average speed is

• 30 km/h
• 60 km/h
• 15 km/h
• 2 km/h

The distance traveled by a moving object per unit of time is called ______________.

• speed
• acceleration
• motion
• velocity

Is this a speed or acceleration graph?

• speed

• acceleration

What is happening at segment E?

• acceleration

• deceleration

• constant speed

• no motion/object at rest

What is happening at segment F?

• acceleration

• deceleration

• constant speed

• no motion/object at rest