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1. If you have a cylinder and a sphere roll down a 3m long board at angle theta, and the time for the cylnder to reach the bottem is 2.4s slower then the sphere. WHat is theta?

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- Thread starter assman
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1. If you have a cylinder and a sphere roll down a 3m long board at angle theta, and the time for the cylnder to reach the bottem is 2.4s slower then the sphere. WHat is theta?

THanks

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Ya thats it. and its a hollow thin walled cylinder.

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arildno

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What is the physical reason for the two objects not arriving at the same time at the end of the slope?

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I'm stumped.

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arildno

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Again:

Have you no clue whatsoever why the ball arrives first?

Have you no clue whatsoever why the ball arrives first?

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The answer sould not be that they land at the same time because of their differing moments of inertia. RIght?

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arildno

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Hence:

You need to find out how the moment of inertia enters your equations, right?

1.Question:

If you are to calculate the torque of external forces about the center of mass, what external force provides the net torque?

Set up Newton's 2.law for the object, plus the moment-of-momentum equation with respect to the center of mass (the torque equation, that is).

2. The object ROLLS:

What relation does this give between the acceleration of the center of mass and the angular acceleration?

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