Question

What is the difference between speed and velocity?
a. speed does not include time, but velocity does.
b. speed does not include a direction, but velocity does.
c. speed is used to calculate acceleration, but velocity is not.
d. speed is used to calculate the rate of motion, but velocity is not.

Answer 1

Speed does not include a direction, but velocity does.

       30 miles per hour north
and
       30 miles per hour west

Same speed.
Different velocity.