Question

A sailor pulls a boat horizontally alongside a dock for 10.0 m with a rope angled at 40.0°. He uses a force of 100.0 N. How much work did he do on the boat?

A. 766 J
B. 643 J
C. 1.00 * 10^3 J
D. 4.00 * 10^4 J

Answer 1

here is the situation described in your problem:

Answer 2

yes:)

Answer 3

now, we have to apply this formula:

Answer 4

which formula?

Answer 5

\[W = Fd\cos \left( {40} \right) = 100 \times 10 \times \cos 40\]

Answer 6

766.0444 so about 766 J is our answer?

Answer 7

yes! That's right!

Answer 8

yay!! :D

Answer 9

:D