1) A train is travelling at a speed of 40 m/s on a curved path of radius 1000 m. The brakes are applied and the train speed is reduced at a constant rate to 30 m/s in 6 seconds. Compute the magnitude of the total acceleration (in g's, recall 1 g = 9.81 m/s^2) of the train immediately after the brakes are applied.

This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A motorist starts from rest at Point A on a circular entrance ramp when t = 0, increases the speed of her automobile at a constant rate and enters the highway at Point B. Her speed continues to increase at the same rate until it reaches 85 km/h at Point C.   Determine the speed at Point B. (You must provide an answer before moving on to the next part.)   The speed at Point B is km/h.   Note: please show step by step solution. Hence, double check the solution. For correction purposes!. I require  handwritten working out please!. Kindly, please meticulously, check the image for conceptual understanding and for extra information purposes!. Also on occasions, I receive wrong answers!!. Please go through the question and working out step by step when you finish them. Appreciate your time!.

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At a certain point in the reentry of the space shuttle into the earth's atmosphere, the total acceleration of the shuttle may be represented by two components. One component is the gravitational acceleration g = 9.67 m/s² at this altitude. The second component equals 10.66 m/s² due to atmospheric resistance and is directed opposite to the velocity. The shuttle is at an altitude of 49.6 km and has reduced its orbital velocity of 28300 km/h to 16160 km/h in the direction = 1.23°. For this instant, calculate the radius of curvature of the path and the rate i at which the speed is changing. Answers: p= i = i i km m/s²