At the Earth's surface a projectile is launched straight up at a speed of 10.1 km/s. To what height will it rise?(adsbygoogle = window.adsbygoogle || []).push({});

Universal gravitational constant = 6.673e-11 N m^2/kg^2

Radius of the earth = 6.370e+6 m

Mass of the earth = 5.980e+24 kg

I know to use the equation U= - (Gm1m2)/ r

but I haven't been getting the right answer

originally I took into consideration that U=1/2mv^2 and set the two equations equal to each other and solved for r which I took to be R+h.

R = radius of earth and h being the rest of the distance starting from the earth's surface.

I would appreciate any help on this it's driving me crazy!! :uhh:

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# Homework Help: Universal Gravitational constant

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