1. A supersonic jet diving at 279 m/spulls out into a circular loop of radius R

Question

1. A supersonic jet diving at 279 m/spulls out into a circular loop of radius R. If the craftis designed to withstand forces accompanying accelerations of up to9.0 g, compute the minimum valueof R.
m

2. A baseball player rounds second base in an arc with a radius ofcurvature of 4.90 m at a speed of5.0 m/s. If he weighs 845 N, what is the centripetal force that must beacting on him? Notice how this limits the tightness of theturn.
N

What provides the centripetal force?
2 centrifugal acceleration
acceleration due to Gravity
friction
velocity
2 centrifugal acceleration
acceleration due to Gravity
friction
velocity
2 centrifugal acceleration
acceleration due to Gravity
friction
velocity
2

Explanation / Answer

Centripetal acceleration is given by, a=v2/R 9g=2792/R R=882.551m The mass of the person is W=mg 845=mg m=86.24kg Centripetal force is given as, F=mv2/r F=86.24*52/4.9 F=439.9N

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