Explore BrainMass
Share

# Laws of Motion : Connected motion

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

(Please see the attached file for detailed problem and fig.)

The two blocks, m1 = 3.0 kg and m2 = 4.9 kg, in the figure (see attachment) are connected by a massless rope that passes over a pulley. The pulley is 12 cm in diameter and has a mass of 2.0 kg. As the pulley turns, friction at the axle exerts a torque of magnitude 0.38 Nm. If the blocks are released from rest, how long does it take the 4.9 kg block to reach the floor from a height of h = 1.0 m?

© BrainMass Inc. brainmass.com March 21, 2019, 4:31 pm ad1c9bdddf
https://brainmass.com/physics/torques/laws-motion-connected-motion-189093

#### Solution Preview

Please refer to the attachment.

Let the acceleration of the masses be a.

We can write the following equations for the two masses :

T1 - 3g = 3a ........(1)

4.9g - T2 = 4.9a ........(2)

For the pulley, moment of inertia I = ½ MR2 = ½ x 2 x 0.062 = ...

#### Solution Summary

The expert examines the connected motion laws. A step by step solution is provided.

\$2.19