A frictionless gear train is shown in the figure. The left

A frictionless gear train is shown in the figure. The left most 12-teeth gear is given a torque of 100 Nm. The output torque from the 60-teeth gear on the right in Nm is

(1, 2) ⇒ N₂ = N₁ ×		Z₁	= N₁ ×	12	=	N₁
		Z₂		48		4

N₃ = N₂ =	N₁
	4

(3, 4) ⇒ N₄ = N₃ ×		Z₃	=	N₁	×	12
		Z₄		4		60

N₄ =	N₁
	20

By power conservation, T₁ × N₁ = T₄ × N₄

100 × N₁ = T₄ ×	N₁
	20

T₄ = 2000 N-m