Two blocks with masses and hang one under the various other. For this difficulty, take the positive direction to beupward, and also use for the magnitude of the acceleration because of gravity.

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Isolate the reduced block (mass ) by considering just the forces that act on it. Use Newton"s 2nd legislation whilenoting that the acceleration of this block is zero.

For Parts C and D the blocks are now speeding up upward (due to the anxiety in the strings) via acceleration of magnitude .