Asked by Dana

Four equal masses of 4.0 kg are placed at the vertices of a square of side 8.0 m. Find the force on the mass at the top left vertex.
Answered by bobpursley
Doesn't make sense. Why would putting mass on the corners of a square cause a force on one of the masses?
Answered by Dana
Force of gravity?
Answered by Kata
(a) Given that the energy released per fission of 235U nucleus is 200MeV, calculate (i) the number of fissions and (ii) the amount of energy (in joules) available if 50g of 235U is completely fissioned.
Answered by Damon
Fx = +G m m /8^2 + G m m /(8sqrt2)^2 = G m^2 [1/64 + 1/128]
Fy =-G m^2[ 1/64 +1/128]
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