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 Interactive Checkpoint
 Speed:  The rate of motion, measured in distance/time.

Answer the following questions about speed.
Enter each answer below and press tab to check
Graded Response
a) A car travels 220 miles in 5 hours. What was the car's average speed in miles per hour (mph)?

 

a) mph

b) The vertical height (in feet) of an elevator moving upward as a function of time (in seconds) is represented by the equation

h = 5t + 1

How fast does the vertical height change, in feet per second?

 

b) fps

c) The speed of an ostrich, s, in meters per second, for its first seven seconds of travel is described by the equation

s = 3t

where t is the time of travel. How fast is the ostrich moving after three seconds?

c) mps