Question
A sled and passenger together have mass 50 kg. A pulling force acts 25° above the horizontal and moves them 20 m across snow at constant velocity. The coefficient of kinetic friction is μₖ = 0.20. Calculate (a) the work done by the pulling force, (b) the work done by friction, and (c) the total work.
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Evidence boundary
The mass, distance, kinetic-friction coefficient, constant-velocity condition, and 25° upward pulling direction all follow OpenStax University Physics Volume 1, Chapter 7, Problem 34. This calculation assumes a level surface and uses g = 9.80 m/s². It does not substitute the neighboring exercise’s downward pushing force or 30° angle, and it reports theoretical work rather than experimental measurements.