what postiton to make a 75 g mass put other in equaliberium?

Question

mass at end = 100 kg, 25 cm potion from end. what position to make a 75 gram mass put the other in equalibruim? what mass would be at 90 cm to put it in equalibrium?

Answer 1

Assuming no mass in between
100*25=75*d
d=33.3 cm

again
100*25=m*90
m=250/9

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