CQ_1_051

The problem:

A ball accelerates at 8 cm/s^2 for 3 seconds, starting with velocity 12 cm/s.

What will be its velocity after the 3 seconds has elapsed?

answer/question/discussion:

v = 12 cm/s + (8 cm/s^2)(3 s) = 36 cm/s

#$&*

Assuming that acceleration is constant, what will be its average velocity during this interval? answer/question/discussion:

vAve = (12 cm/s + 36 cm/s) / 2 = 24 cm/s#$&*

How far will it travel during this interval?

answer/question/discussion:

‘ds = (24 cm/s) * (3 s) = 72 cm

#$&*

10 min

&#Very good responses. Let me know if you have questions. &#