Z jakiej wysokosci musi zjechac wagonik w wesolym miasteczku aby moc zatoczyc "petle smierci". promien petli wynosi 5m.
pooooooomocy:)
pooooooomocy:)
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Ek = mV^2/2
Emech,a = Emech,b
mgH = 2mgR + mV^2/2
mg = mv^2/R
mV^2/2 = mgR/2
mgH = 2mgR + mgR/2
2mgH = 4mgR + mgR
2mgH = 5mgR
2H = 5R
H = 5/2R
R = 5m
H = 5/2 * 5m = 12,5m