# Physics

In the experiment, you will study a torsion pendulum and compare the periods of a suspended sphere and of a suspended cube. The rotational inertia of a sphere is Is = 1/10(MsD^2), where Ms is the mass of the sphere and D is its diameter. The rotational inertia of a cube is Ic = 1/6(McS^2), where Mc is the mass of the cube and S is the length of its side. If the cube and the sphere are suspended from the same wire, what is the expected ratio of their periods, Tc/Ts?
Assume that D = S,
Ms = 0.20kg,
and Mc = 0.6 kg.
-----------------------
To find the ratio Tc/Ts, I tried doing:
(1/6 * 0.6) / (1/10 * .2) = 5, but this is incorrect.
What am I missing?

1. 0
2. 0
3. 35

## Similar Questions

1. ### math

The formula T=2*pi*sqrt[L/g] gives the period of a pendulum of length l feet. The period P is the number of seconds it takes for the pendulum to swing back and forth once. Suppose we want a pendulum to complete three periods in 2

asked by Gabi on April 10, 2011
2. ### math

The formula T=2*pi*sqrt[L/32] gives the period of a pendulum of length l feet. The period P is the number of seconds it takes for the pendulum to swing back and forth once. Suppose we want a pendulum to complete three periods in 2

asked by Gabi on April 11, 2011
3. ### physiscs

a pendulum of the length L is suspended from the ceiling of an elevator. When the elevator is at rest , the period of the pendulum is T. In instant when the pendulum reaches its highest position the elevator starts the free fall.

asked by Ray on September 22, 2010
4. ### Physics

An engineer has an odd-shaped object of mass 16 kg and needs to find its rotational inertia about an axis through its center of mass. The object is supported on a wire along the desired axis. The wire has a torsion constant κ =

asked by Shane on April 16, 2015
5. ### mambane

A 10.0g bullet is fired with a speed of 500m/s into a pendulum block of mass 5.00kg, suspended from a cord 0.600m long. Calculate: (a)the vertical height through which the pendulum rises. (b) the initial kinetic energy of the

asked by Xolani Rudolph Ngovene on September 22, 2014
6. ### physics

A ballistic pendulum consists of a rectangular wooden block of mass 1.5 kg suspended from a ceiling. A bullet mass 0.025 kg undergoes a completely inelastic collision with the ballistic pendulum. Due to the collision the pendulum

asked by joane on January 14, 2012
7. ### Physics

How do you find the ratio of the new/ old world periods of a pendulum if the pendulum wee transported from earth to the moon, where the acceleration due to gravity is 1.63m/s^2? Im not sure if we use 9.8 at all, I think I'm

asked by cris on December 10, 2012
8. ### Physics

In a ballistic pendulum experiment, a small marble is fired into a cup attached to the end of a pendulum. If the mass of the marble is 0.0255 kg and the mass of the pendulum is 0.250 kg, how high will the pendulum swing if the

asked by JL on October 27, 2015
9. ### physics

A simple pendulum has a mass m and carries a charge q. The pendulum is suspended between the vertical plates of a capacitor of separation distance d. If the string of the pendulum makes an angle θ with the vertical, what is the

asked by David on March 13, 2012
10. ### physics

A simple pendulum has a mass m and carries a charge q. The pendulum is suspended between the vertical plates of a capacitor of separation distance d. If the string of the pendulum makes an angle θ with the vertical, what is the

asked by David on March 13, 2012

More Similar Questions