Activities:
1. Name and describe the TWO Tropical Zones.

2. Define trade winds.​

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. 

The sounds will have a high pitch because the metal is vibrating quickly

Ihad this on a test i just recently took on edgenuity and got 100%! the answer is b. no acceleration.