Hitanshi P.

asked • 10/27/19

Does the Mass of the Pulley even matter?

 A mass m1 = 6.00 kg is connected by a light string that passes over a pulley of mass m3 = 7.0 kg to a mass m2 = 6.00 kg sliding on a frictionless inclined surface that makes an angle of 32° with the horizontal. The coefficient of kinetic friction between the mass m1 and the horizontal surface is 0.15. There is no slippage between the string and the pulley. What is the magnitude of the acceleration of the system? (The moment of inertia of the pulley is ½Mr².) 


1 Expert Answer

By:

David B. answered • 10/27/19

Tutor
5.0 (503)

Physics

Hitanshi P.

Then how would it be incorporated into the calculation
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10/27/19

David B.

tutor
When working with objects undergoing translational motion, you sum up the forces acting on the object. When working with objects undergoing rotational motion, you sum up the torques on the object. And if he object is undergoing both types of motion (for example a ball rolling down an incline), then you sum up the forces and the torques on the object. In this case you will need to sum up forces on m1 and m2, and sum up torques on the pulley.
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10/28/19

Hitanshi P.

I know how to add the torque and sum of forces separately but how would i combine them?
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10/29/19

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