Engineering
Physics
Center of Mass
Question
Two men 'A' and 'B' are standing on a plank. 'B' is at the middle of the plank and 'A' is the left end of the plank. System is initially at rest and masses are as shown in figure. 'A' and 'B' starts moving such that the position of 'B' remains fixed with respect to ground till 'A' meets 'B'. Then the point where A meets B is located at :
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Solution
mpsp + mAsA + mBsB = 0
sB = 0
40 sp + 40 sA = 0
sp = – sA
sA – sB = sAB = 60 cm
sA = 60 cm
Sp = – 60 cm
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