Physics

Problem

The velocity of a skateboarder moving in a straight line is recorded at three instants:

0\,\text{s}:\;3\,\text{m/s}

2\,\text{s}:\;9\,\text{m/s}

5\,\text{s}:\;-3\,\text{m/s}

(opposite direction to the initial motion). Calculate the following: a. (a) Average acceleration during the first

2\,\text{s}

. b. (b) Average acceleration during the next

3\,\text{s}

. c. (c) Average acceleration for the entire

0\text{–}5\,\text{s}

interval and state its sign.