Physics Lab 9 Inertia of Moving Objects PDF

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Inertia of moving objects lab...

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Phy 116 (D001)Lab #10: Motion of Inertia of Moving Objects CUNY College of Staten Island

Lab Objective:

The main objective of this experiment was to measure the moments of inertia of both a solid disk and a ring and to compare these values with those calculated using the known formula for moment of inertia.

Introduction:.

A moment of inertia is defined as an object's resistance to change in angular momentum. It is the rotational analog to mass or inertia in translation motion. also referred to as I of a basic solid and uniform density object can be calculated by the derived formula of I = x^2+y^2 * dm. The formula is made for most common shapes making it easy to determine the measure of inertia for a given shape. Moments of inertia for complicated shaped can be subdivided into simpler shapes and be calculated. If an object has a uniform density or uneven distribution of weight, it is possible to not be able to determine the inertia. In the lab we constructed a vehicle to measure the moment of inertia of a given object by converting gravitational potential energy into rotational kinetic energy in order to be measured. The mass

is suspended from a string that passes through two pulleys which we use to alter orientation. We wound it about the axel which served as the radius of the rotating table. Using our knowledge from the law of conservation of energy, the gravitational PE of the mass before the drop is equal to the rotational KE of the rotating table before it hits the ground.

Procedure:

First we set up the ramp at a small angle and use the digital angle finder to ensure correctness. We put the angle finder on top of the ramp and began to gently move the height to a degree of 6. Now we switch the detector on the motion detector on and put it in cart mode. We then connect it to the labquest interface and the computer. When it was connected the object rolling down initiated a click to let us know we are doing the procedure correctly. Then we used a hollow cylinder and sphere and a solid cylinder and sphere. We kept our object of choice in a constant position of 115cm which is the top of the ramp in front of motion detector. We use collect as the object rolls down the ramp to collect the v/t. We use R to obtain the slope which is simply put acceleration. We did this 5 times total to get all of the slopes for the different objects respectfully.

Discussion:

From the data we gathered we looked at our theoretical k values and see how close they are to our observed values. All values were in close proximity of one another. each other. With our data and calculations we see that the data corresponds with the newton's second law which said that the acceleration of a body that is produced by a net force is directly proportional to the magnitude of that net force which we see is is true.

Conclusion:

Here we can conclude that this experiment is directly proportional to the properties of newton’s second law where the acceleration and magnitude of a net force are directly proportional within the inertia.

References:

“The Physics Classroom Tutorial.”...