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Homework Statement
Which of the following could help to increase average velocity of the left skate of the person:
Decreasing the static friction coefficient between the skate and the ground.
Increasing the static friction coefficient between the skate and the ground.
Decreasing the kinetic friction coefficient between the skate and the ground.
Increasing the kinetic friction coefficient between the skate and the ground.
Increasing the distance between the lines (circa 5m)
Decreasing the distance between the lines.
Homework Equations
The Attempt at a Solution
I think increasing the static friction and decreasing the kinetic friction would help. Static friction works in the direction of motion, does it?