- #1
izzyosman
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Homework Statement
Gear wheels B and D are mounted on a right-angled carrier, C.
They mesh with a fixed gear wheel A, of radius 200mm. Each of the small wheels has a mass of 3kg and a radius of 100mm and may be considered to be a uniform circular disc. The carrier, which is freely pivoted about O, has a total mass of 6kg and may be considered as two uniform rods, each of legnth, 300mm.
The assembly is released from rest with the centre of B vertically above O. Find the angular velocity of the small wheels when the centre of D just reaches the point vertically below O.
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Homework Equations
Rotational and Translation Impulse-Momentum Equations
The Attempt at a Solution
I'm just starting to attempt this question by looking at the bars separately. In the case of bar BC, I am not quite sure what force are acting on the bar apart from its weight.
Is there a force exerted by the gear B?
This leads me to wonder what to put in the equation:
work done=change in ke for the rotational component.
I know the right hand side would be 1/2 I(Theta dot2^2 - 0)
Please help!