Rather than taking the stairs, Martin gets from the second floor of his house to the first floor by sliding down the banister that is inclined at an angle of 30.0°
to the horizontal. a) If Martin has a mass of 45 kg and the coefficient of sliding
friction between Martin and the banister is 0.20, what is the force of friction
impeding Martin’s motion down the banister? b) If the banister is made
steeper (inclined at a larger angle), will this have any effect on the force of
friction? If so, what?