26. Snoopy, in hot pursuit of the Red Baron, is flying his vintage warplane in a “loop-the-loop" path. His instruments tell him that the plane is level (at the bottom of the loop) and travelling at a speed of 180 km/h. He is sitting on a set of bathroom scales. He notes that the scales show four times his normal weight. What is the radius of the loop, in metres?

Different situation now. You re out in space, on a rotating wheel-shaped space station of radius 743 m. You feel planted firmly on the floor , due to artificial gravity. The gravity you experience is Earth-normal, that is, g = 9.81 m/s^2. How fast is the space station rotating in order to produce this much artificial gravity? Express your answer in revolutions per minute (rpm).     0.115 rpm     85.4 rpm     0.549 rpm     1.097 rpm

A 615 kg car completes one lap in a time of 14.3 sec around a circular track with a radius of 50.0 m. What is the acceleration of the car? What force must the track exert on the car to produce this acceleration?

A 5 kg mass is spun around in a circle of radius 2m with a period of 7 s. What equation would you use to calculate the centripetal acceleration? Calculate the centripetal acceleration. Possible Formulas that can be used to answer the question: v=(2πr)/T ac=v2/r ac=(4π2r)/T2 Fc=mac Fg=mg F=(Gm1m2)/d2 g=Gm/r2 T2=(4π2/Gm)r3 v=√(Gm)/r g=9.80m/s2 G=6.67x10-11 (N∙m2)/kg2