Question

Which of the following is an example of acceleration? Select one:
a. A boy walks two miles in one hour.
b. A girl walks two miles per hour north for three hours.
c. A boy walks two meters north, turns west, and walks another two meters.
d. A girl drives a total distance of 240 miles in just under four hours.

Answer 1

Acceleration' is any change in the speed or direction of motion. we can look through the choices:
A).  /
B).   No.  Neither speed nor direction changed.
C).  /
D).  Yes.  The boy's direction changed.