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which is an example of acceleration?

Aa girl walks two miles per hour north for three hours.

Ba boy walks two miles in one hour.

Ca girl drives a total distance of 240 miles in just under four hours.

Da boy walks two meters north, turns west, and walks another two meters.

Verified Answer :

AL2006

'Acceleration' is any change in the speed or direction of motion.
Now that we ( I ) have that definition clear, we can look through
the choices:

A).  \ 
B).    >  No.  Neither speed nor direction changed.
C).  /

D).  Yes.  The boy's direction changed. 

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