Luke pulls a sled using a force of 65 cap n for a distance of 25 m across level ground. The rope Luke pulls forms an angle of 25 degrees with the ground. About how much work does Luke do on the sled?

Only the component of Luke’s force parallel to the ground does work over the sled’s horizontal motion. Use W = Fd cos θ: W = (65 N)(25 m) cos 25° ≈ 1,470 J, which is about 1,500 J. Therefore, the correct choice is B, 1,500 J.

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