Posted by Hannah on Tuesday, October 6, 2009 at 12:00pm.
Three objects are connected as shown in the figure below. They move along a horizontal, frictionless surface, and are pulled to the right with a force Fext = 2.4 N. With the three mass values given as m1 = 604 g, m2 = 744 g, and m3 = 693 g. Calculate the magnitude of the acceleration of the three objects.
t1 t2 Fext
m1m2m3>

PHYSICS  Sarah, Tuesday, October 6, 2009 at 12:02pm
F= (m1+m2+m3) * a
You know F=2.4N and you know all three masses, so convert mass to kg and solve for a. 
PHYSICS  bobpursley, Tuesday, October 6, 2009 at 12:02pm
a=Fext/sumofMasses
T1=a*m1
T2=a*(m1+m2) 
PHYSICS  Hannah, Tuesday, October 6, 2009 at 12:12pm
i did it slightly differently but thank you!