Answer: I think the answer C
Explanation:
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If the boat is i travling at 10 m/s and the river is 8.0 m/s the boats speed is 18.0 m/s
The hardest part of the job is to find the right formula to use, and write it down. You've already done that ! The rest is just turning the crank until an answer falls out.
You wrote. E = m g h.
Beautiful.
Now divide each side by (g h), and you'll have the formula for mass:
m = E / (g h).
You know all the numbers on the right side. Just pluggum in, do the arithmetic, and you'll have the mass.
