<h3>WATER</h3>
Explanation:
<h2>#CARRYINGTOLEARN:)</h2>
Answer:
Expression of work done is

Work done to move the sled is given as 187.2 J
Explanation:
As we know that the formula of work done is given as

here we know that
F = 12.6 N
d = 15.4 m

so we will have


The answer for this question is b because it says how far it goes before he begins to take brake
You would see mountains off in the distance as if the earth was actually flat. but it seems flat because its so big