A child is going down a snowy hill on a sledge. Draw a free-body force diagram for the child and sledge.
First, we model the child as a single point particle. Then, we add in arrows representing vectors for the relevant forces: friction, weight and the contact force.
We can also assume that the child has reached terminal velocity and therefore the frictional force is equal in magnitude to the weight component that is pulling the child down the slope.
TB
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