Thursday
September 18, 2014

Homework Help: physics

Posted by **chocolatekisses on Thursday, February 8, 2007 at 8:16pm.

Three boxes are connected by cords, one of which (mA) wraps over a pulley having negligible friction on its axle and negligible mass and two boxes (mB & mC) are hanging. The masses are mA = 22.0 kg, mB = 40.0 kg, mC = 16.0 kg.

-When the assembly is released from rest, what is the tension in the cord that connects boxes B and C?
-How far (in meters) does box A move in the first 0.250 s (assuming it does not reach the pulley)?

Write the force equation clockwise being positive.

Ma*g-Mb*g-Mc*g=totalmass*acceleration.
where total mass is the sum of the three masses. Solve for acceleration.
Tension that connects to B is the same as the tension that is connected to A.

Ma*g-Tension=totalmass*acceleration

displacement= 1/2 acceleration*time^2

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics helppp - In the figure below, three ballot boxes are connected by cords...
phyics help nedded - In the figure below, three ballot boxes are connected by ...
Math, Physics - Two blocks with indicated masses are connected by a cable of ...
Physics - A ramp, a pulley, and two boxes. Box A, of mass 10.0 kg, rests on a ...
physics - TWO BOXES A AND B ARE LYING ON THE TABLE AND ARE CONNECTED BY A PIECE ...
Physics - The two blocks in the figure are connected by a massless rope that ...
physics - Block A (mass 40 kg) and block B (mass 80 kg) are connected by a ...
physics - Block A (mass 40 kg) and block B (mass 80 kg) are connected by a ...
Physics - The two blocks in the figure below, m1 = 1.2 kg and m2 = 4.8, are ...
physics - Two blocks are connected by a massless rope that passes over a pulley...

Search
Members