A 160-lb pilot flies a stunt plane in a vertical loop of 500-ft radius. Determin

Question

A 160-lb pilot flies a stunt plane in a vertical loop of 500-ft radius. Determine the

speed of the plane at points A and B, Knowing that at point A the pilot

experiences weightlessness and that at point B the normal upward force from the

seat onto the pilot is 550 lb.

A 160-lb pilot flies a stunt plane in a vertical loop of 500-ft radius. Determine the speed of the plane at points A and B, Knowing that at point A the pilot experiences weightlessness and that at point B the normal upward force from the seat onto the pilot is 550 lb.

Explanation / Answer

At A:

mg=mv^2/R

So

v=sqrt(Rg)=126.83ft/s {At A}

At B:

550-160=mv^2/R

So

v=sqrt(390R/m)=198.02ft/s {At B}

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