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In order to simulate different values of...

In order to simulate different values of `g` aspiring astronauts are put on a plane which dives in a parabola given by the equation `x^2 = 500y`. Where `x` is horizontal, `y` is vertically upwards, both being measured in meter. The `x`-component of the velocity of the plane is constant throughout, and has the value of `360 km//h`. the effective `g`("g-force") experienced by an astronaut on the plane equals

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