Suppose vcm = 0, it implies that the pomentum, p = mvcm = 0.
m1v1 = m2v2 = 0
m1v1 = - m2v2
Consider a system of two blocks that have masses m1 and m2 . Assume that the blocks are point-like particles and are located along the x axis at the coordinates x1 and x2 as shown (Figure 1) . In this problem, the blocks can only move along the x axis.
Suppose that v⃗cm=0 . Which of the following must be true?
D) none of the above
(acm)x = F1x+F2xm1+m2
Under what condition would the acceleration of the center of mass be zero? Keep in mind that F1x and F2x represent the components, of the corresponding forces.
Consider the same system of two blocks. Now, there are two internal forces involved. An internal force F⃗12 is applied to block m1 by block m2 and another internal force F⃗21 is applied to block m2 by block m1 (Figure 4) . Find the x component of the acceleration of the center of mass (acm)x of the system.
Express your answer in terms of the x components F12x and F21x of the forces, m1 and m2 .
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