A pinion with radius r₁ and inertia l₁ is driving a gear with radius r₂ and inertia I₂. Torque _$\tau$₁ is applied on pinion. The following are free body diagrams of pinion and gear showing important forces (F₁ and F₂) of interaction. Which of the following holds true?

Question

Multiple choice

F₁ ^{_{$ \neq$}}F₂; ^{![](https://i.imgur.com/01MDD9u.png)}; F₂= ![](http://i.imgur.com/4AcAOb7.png)
F₁ = F₂; ; F₂=
F₁ ^{_{$ \neq$}}F₂; ^{![](https://i.imgur.com/GD5j0Sd.png)}; F₂= ^{![](http://i.imgur.com/Tm4IKZx.png)}

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Accepted Answer

F₁ = F₂; ; F₂=

A pinion with radius r1 and inertia l1 is driving a gear with radius r2 and inertia I2. Torque $\tau$1 is applied on pinion. The following are free body diagrams of pinion and gear showing important forces (F1 and F2) of interaction. Which of the following holds true?