An accelerometer C is mounted to the side of the roller-coaster car and records a total acceleration of 3.0g as the empty car passes the bottommost position of the track as shown. If the speed of the car at this position is 205 km/h and is decreasing at the rate of 18 km/h every second, determine the radius of curvature p of the track at the position shown. Co 0.76 m

A car travels along a horizontal circular curved road that has a radius of 600 meters. If the speed is uniformly increased at a rate of 0.15 m/s², determine the magnitude of the acceleration at the instant the speed of the car is 17 m/s. 0.15 0.23 0.25 0.48 0.5

Please give me the correct answer, please. Thank you. This is my last attempt.