A medical saw is rotating at a constant rate of 15 revolutions per second. If it has a radius of 12 cm, what is the centripetal acceleration at its rim? 1,064.8 m/sec2 2,700 m/sec2 1130.4 m/sec2 68.46 m/s2 None of the choices given.

A fast-pitch softball pitcher with an arm 0.65m long executes a pitch in 0.5 seconds. At the instant of release the tangential velocity of the ball is 26m/s. What is the magnitude of the centripetal acceleration at ball release?

2 A new car is tested on a 250-m-diameter track. W S X ommand # 3 So E D C $ 4 888 R F % 5 V T G 6 ▼ Part A B If the car speeds up at a steady 1.4 m/s², how long after starting is the magnitude of its centripetal acceleration equal to the tangential acceleration? Express your answer with the appropriate units. Provide Feedback At= Value MacBook Air 320 Y Submit Request Answer H & o 7 N HÅ 329 U 8 J → W M Units ( 9 K MOSISO DD ? O O L 1- command P { option + ? 1 1 Review Next > delete retu

You're out in space, on a rotating wheel-shaped space station of radius 1426 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).     0.083 rpm     118.3 rpm     0.554 rpm     0.792 rpm