Final answer:
Given the total mass, distance of travel, coefficient of friction, and angle of the applied force, we can calculate the work done by the pulling force and conclude that the sled has zero acceleration because it moves at constant velocity. The coefficient of friction is provided, eliminating the need for further calculation.
Step-by-step explanation:
When a sled is pulled across snow at constant velocity, the total work done by the force is equal to the work done against friction, since there is no acceleration involved. Therefore, for part A) we begin by finding the force of friction (Ffriction), which equals the normal force (N) multiplied by the coefficient of friction (μ). The normal force is equal to the weight of the sled and passenger, less the vertical component of the pulling force.
The work done by the force (Wforce) is equal to the force multiplied by the distance times the cosine of the angle above the horizontal.
For part B), since the sled is moving at constant velocity, the acceleration (a) is zero.
For part C), we are provided with the coefficient of friction (μ), which is 0.20. This is not a value we need to find since it's given in the problem statement.
The answer to part D) is that there is enough information to answer the other parts, as we have all the necessary quantities provided by the problem.