9.
What was the average acceleration of the car from 40 seconds to 46 seconds? Include the
correct units. Remember that A means final value minus initial value. What does the
negative number of your

Ke reqd to move from 0 to 50 will be proportional to 50x50 or 2500. this is equal to w.  to change vel from 50 to 150 you need energy prop to 22500 - 2500 = 20,000. this corresponds to 8w.  best answer is a) . work reqd is prop to velocity squared.