A uniform plank AB of length 5 m and mass 22 kg rests horizontally in equilibrium on supports at C and D. AC = 1.7 m and CD = 2.5 m. Find the reaction on the plank at D. An object of mass 6 kg is now attached to the plank at A and equilibrium is maintained. Calculate the new reaction at C.

f=gm1m2/d^2 it d

f is force g is gravitaiton constant, m1 is mass of first object, m2 is mass of second object. d is distance between two object

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multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).

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