(adsbygoogle = window.adsbygoogle || []).push({}); Figure 10-43 shows particles 1 and 2, each of mass m, attached to the ends of a rigid massless rod of length L1 + L2, with L1 = 19 cm and L2 = 79 cm. The rod is held horizontally on the fulcrum and then released.

a.What is the magnitude of the initial acceleration of particle 1?

b.What is the magnitude of the initial acceleration of particle 2?

I have no idea where to begin with this problem when the only thing they give me is length. Should mass be neglected in the equation for angular inertia?

In Figure 10-53, two blocks, of mass m1 = 310 g and m2 = 630 g, are connected by a massless cord that is wrapped around a uniform disk of mass M = 500 g and radius R = 12.0 cm. The disk can rotate without friction about a fixed horizontal axis through its center; the cord cannot slip on the disk. The system is released from rest.

Find the magnitude of the acceleration of the blocks.

a= 2.635 m/s^2 (I got the right answer, but I don't specifically understand the steps to getting it)

b. Find the tension of T1

c. Find the tensin of T2

For the last problem in finding the tension, why does the following not work?

-Fg + T1 = ma

T1 = Fg + ma

T1 = (.310 kg * 9.8m/s^2) + (.310 kg * 2.635 m/s^2)

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Need help with torque and angular inertial problems

**Physics Forums | Science Articles, Homework Help, Discussion**