4/28/2023 0 Comments Drexel physics 101 qIf you repeat the experiment several times you can be pretty certain that your observations are accurate and consistent. Repeat the launch of both cylinders at least 10 times and carefully observe which one arrives at the bottom of the incline as the first one. Both cylinders (the batteries) will roll down the incline. Hold the cylinders initially at rest and then, by quickly rising the ruler, allow the cylinders to roll. Using a set-up as showed above, release both cylinders simultaneously using for instance a ruler. Therefore, these two types of batteries have entirely different moments of inertia about the symmetry axes: IM and Im, with obviously IM > Im (the actual ratio IM/Im_is ~ 40 - 50). For instance, the D-battery has a mass of ~ 140 g, while the AA-battery has a mass of ~25 g. These two cylinders (the D-battery and the AA-battery) differ substantially in their diameters and masses. The batteries may have slightly different distribution of masses inside their interiors, but we can assume, for simplicity of the experiment, that they both represent uniform solid cylinders. Both types of batteries are easily available at any store - see the attached Photo. The small cylinder - an AA battery (mass m). The cylinders: as the large cylinder - the best is a D- type battery used in flashlights (mass M). The incline can be the same as that you used in Lab 2. Lift up the ruler - to launch both cylinders at the same time ? hĤ. If the length of the incline is ~ 25-30 cm, the height h should be ~ 1-3 cm. Make the slope small so that the cylinders will roll down not too fast. You need to arrange an incline similarly like in Lab 2. If the object is rolling, the total kinetic 1 ¹ 10². An object that rotates with an angular speed carries a rotational kinetic energy KE = Iw², where I 2 is the moment of inertia and to represents its angular speed. If the object is rolling, the total kineticĢ. An object that rotates with an angular speed carries a rotational kinetic energy KE =- Iw², where I is the moment of inertia and a represents its angular speed. 1 where M represents - MR², 2 For a solid cylinder the moment of inertia about its axis of symmetry is I = mass of the cylinder and R is its radius. In case of continuously and uniformly distributed mass, I = fr² extends over the whole volume of the solid.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |