Physics
Physics, 20.07.2019 10:30, bnnnkyl22

Aroller-coaster car speeds down a hill past point a and then rolls up a hill past point b, as shown below. a. the car has a speed of 20.0 m/s at point a. if the track exerts a normal force on the car of 2.06 × 104 n at this point, what is the mass of the car? (be sure to account for gravitational force.) b. what is the maximum speed the car can have at point b for the gravitational force to hold it on the track?

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