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## Homework Statement

A passenger is standing without slipping in a forward accelerating train. The coefficient of static friction between the feet and floor is 0.47

a) Draw an FBD for the passenger in Earth's frame of reference

b)Draw an FBD for the passenger in the train's frame of reference.

## The Attempt at a Solution

a)

Relative to the earth, we know the passenger in traveling with the same acceleration as the train. Therefore, the train has a force applied and a force of friction in the opposite direction. However, does this also apply to the person who is standing still in the train?

b) For this, I am assuming that there is no force applied or force of static friction because the person is standing still. There is a force normal and force of gravity. Is this right? If it is, do I only draw the FBD with only Fg and Fn?