Question

A baseball is hit with a bat etc .....

Answer 1

11

I've already done this in another question answered just before this one. Just follow what I did with that question.

12.

Givens

Every driver should know the answer to this question. It is an amazing difference.

vf = 0

vi = 59 m/h

d = ???

a = a constant

v1a = 25 m/h

Formula

vf^2 = vi^2 + 2* a*d

vf = 0 and a is negative. Also you don't have to make any conversions since you seek a ratio

- vi^2 = 2*-a * d

(59 m/s^2/ (25 m/s)^2 = (2 -a * d1) / (2 - a * d)

(59/25)^2 = (d / d1)

5.56 = d1/d2

The answer is C.

13

You should be able to do this on your own. The only trick is to convert the km to meters.

d = 3.7 km = 3.7 km * 1000 m/km = 3700 m

vi = 0

vf = 26 m/s

a = ??

formula

vf^2 = vi^2 + 2* a* d

26^2 = 0 + 2*2700 * a

576 =5400*a

576 / 5400 = a

a = 0.125 which they have rounded to 0.12

Answer E.