Review Concept Simulation 9.2 and ConceptualExample 7 as background material for

Question

Review Concept Simulation 9.2 and ConceptualExample 7 as background material for this problem. A jet transporthas a weight of 8.28 x 106 N and is at rest on therunway. The two rear wheels are 18.0 m behind the front wheel, andthe plane's center of gravity is 12.8 m behind the front wheel.Determine the normal force exerted by the ground on(a) the front wheel and on(b)each of the two rear wheels.

Explanation / Answer

the jet is equilibrium => total torque is zero consider the pivot is the contact point of rear wheel =>   N1*18 - W*(18-12.8) = 0 Normal force by the front wheel : N1 = (18-12.8)*W/18 =2.392x10^6 N normal force by rear wheels : N2 = W - N1 = 5.888x10^6 N => on each rear wheel : N2' = N2/2 = 2.944x10^6 N

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