Speed, Velocity, and Acceleration

What is the equation for speed?

• speed = time / distance

• speed = distance / time

• speed = distance . time

What is the car's speed? 

• 15,000 m/s

• 250 m/s

• 4.1 m/s

Using the speed triangle, what is the formula to find distance? 

• distance = time /  speed

• distance = speed . time

• distance = speed / time

What axis is distance plotted on? 

• y-axis

• x-axis

If an object has a constant speed what does the line on the graph look like? 

• a straight line going upwards or downwards (diagnal)

• a horizontal line 

How do you know the object is at rest? 

• when the line is a curved line. 

• when the line is a straight line going up or down 

• when the line is a flat horizontal line

How is velocity different than speed?  (Hint: think about the definitions of each)

• velocity has distance and speed does not

• speed has direction and velocity does not

• velocity has direction and speed does not

What is acceleration?

• change in speed only

• change in speed as well as direction 

• only when an object speeds up

• only when an object slows down 

When is an object's acceleration negative? 

• When the object speeds up.

• When the object slows down. 

• When the object is at rest.

What is the formula for acceleration? 

• acceleration = change in velocity                                  /change in time

• acceleration = velocity . time