Saturday
April 18, 2015

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 - Two masses are connected by a string. Mass A is on a flat roof and ...
Physics - Two masses, mA = 40.0 kg and mB = 55.0 kg, are connected by a massless...
Physics - A special pulley has two discs with radii R1 = .8 m and R2 = .35 m. A ...
physics help please - The two blocks are connected by a light string that passes...
Physics - Hi, I've been having issues with solving this problem. Could anyone ...
PHYSICS - two masses m1=400.g and m2 =600.g are connected with a light string ...
PHYSICS 1301 (COLLEGE) - As shown in the figure below, two masses m1 = 4.10 kg ...

Members