Mechanics11/Seite14/Loesung5.5

a)

w = f/T = (2 pi * 15) / 120s = 1/4 pi

aZ = (1/4 pi)2 * 5,3m = 3,26m/s2

3,26m/s2 / 9,81m/s2 = 0,33 = 33%

b)

FR = mue * FN

=> FG = mue * FZ

=> g = mue * aZ

g = mue * w2 * r

=> w = $$g/(mue * r)$$ = $$9,81/(0,1 * 4,2)$$ s-1 = 4,8s-1

w = 2 * pi * f

=> f = w/2pi = 0,77s-1

T = 1,3s