# AP Physics B

posted by .

system consists of a steal beam of mass M 􏰀 68.4 kg and length L 􏰀 1.84 m, with a 39.0-kg
brass sphere attached at the right end of the rod, as shown below.
BA
a. Determine the moment of inertia of the system for rotation about an axis through the center of the steel beam (axis A).
b. Determine the moment of inertia of the system for rotation about an axis through one end of the beam (axis B).
c. Determine the constant horizontal force, F, that must be exerted on the brass sphere in order to produce an angular acceleration of the system such that 􏰅 􏰀 2􏱐 rads. F is exerted perpendic- ular to the steel beam, and the system rotates around axis B.
d. Consider part c. If the system started from rest, determine the linear velocity of the brass sphere after the force has been applied for 4.0 s.

• AP Physics B -

125, 130

• AP Physics B -

D

• AP Physics B -

I know this question is old. But for anyone looking it up now, here's how to do it.
Use the formula
I = 1/12ml^2

## Similar Questions

1. ### Physics - Science

Imagine a hollow sphere of radius R and mass M. It is welded to the end of a solid rod of length L, whose mass is also M. The rod is attached to the sphere in such a way that the whole assembly, when viewed from the side, looks like …
2. ### Physics

A beam of mass mb = 10.0 kg, is suspended from the ceiling by a single rope. It has a mass of m2 = 40.0 kg attached at one end and an unknown mass m1 attached at the other. The beam has a length of L = 3 m, it is in static equilibrium, …
3. ### Physics

A beam of mass mb = 10.0 kg, is suspended from the ceiling by a single rope. It has a mass of m2 = 40.0 kg attached at one end and an unknown mass m1 attached at the other. The beam has a length of L = 3 m, it is in static equilibrium, …
4. ### Physics

A beam with a length of 7 m and a mass of 110 kg is attached by a large bolt to a support at a distance of d = 3 m from one end. The beam makes an angle θ = 30° with the horizontal, as shown in the figure. A mass M = 492 kg is …
5. ### Physics

A 2.5 m rod of mass M= 4. kg is attached to a pivot .8m from the left end so that it can rotate vertically. At the left end of the rod is a small object with mass m=1.5kg. A spring with a spring constant k=90N/m is attached to the …
6. ### physics

A massless rod of length 1.00 m has a 2.00-kg mass attached to one end and a 3.00-kg mass attached to the other. The system rotates about a fixed axis perpendicular to the rod that passes through the rod 30.0 cm from the end with the …
7. ### physics

Question Part Points Submissions Used A thin cylindrical rod of length 3.00 m and mass 1.5 kg has two spheres attached on its ends. The centers of the spheres are 1.50 m from the center of the rod. The mass of each sphere is M = 0.72 …
8. ### Physics

A mass of 100g is attached to one end of a massless rod, 10cm in length, which is pivoted about the opposite end. The rod is held vertical, with the mass at the top, and released. The rod swings. A. What is the speed of the mass at …
9. ### Physics

A purple beam is hinged to a wall to hold up a blue sign. The beam has a mass of mb = 6.7 kg and the sign has a mass of ms = 17.4 kg. The length of the beam is L = 2.83 m. The sign is attached at the very end of the beam, but the horizontal …
10. ### precalc

Find the exact value of each expression, if it exists: the -1 are representing the inverse functions! (a) sin -1 (-√2/2) (b) cos−1 (−1) (c) sin( 􏰀sin−1 (π)􏰁) (d) cos−1􏰀(cos􏰀(−4π􏰁􏰁/ …

More Similar Questions