- Thread starter
- #1

#### coolbeans33

##### New member

- Sep 19, 2013

- 23

1) find the average speed of the ball for

a) 0≤ t ≤1

b) .5≤ t ≤ 1

c) .9 ≤ t ≤1

the answer to a) is 20 ft/sec, which is what you get if you plug 1 into the equation. the answer to b) is 12 ft/sec, and c) is 5.6 ft/sec.

how the heck did they get these answers?? I just don't get it. please explain how to do this step by step

also it asks to estimate the speed of the ball after 1 second.