At the end of the Galactic Green Lion roller coaster, a 400 kg car has a speed of 22 m/s (point A). For safety, the coaster has to be going only 3 m/s when it enters the platform (point B) for the brakes to be able to stop in time. How high does the final hill need to be to slow down the coaster enough?

Answer: 1.4 seconds which is the third optionexplanation: current is defined as the flow of charge per timetherefore, the equation that relates current, charge and time can be expressed as follows: i = δq / δtwhere: i is the current given = 1.8 ampereδq is the charge given = 2.5 coulombδt is the time required for the flow of the given charges to give the 1.8 ampere.substitute with the givens in the above equation to get the time as follows: 1.8 = 2.5 / δtδt = 2.5 / 1.8 = 1.38888 which is approximately 1.4 secondshope this was !

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