A projectile is shot straight up from the earth's surface at a speed of 6000 km/hr.How high does it go?(adsbygoogle = window.adsbygoogle || []).push({});

i started out by converting km/hr to m/s

so i got 6000km/hr= 1666.666666m/s

then i used this formula:

v^2=2gy

and i got:

y= 141723 m= 141.723km (i just got lucky that my answer was close)

the correct answer wass 145 km

how do you get 145? can someone please help? thanks!

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# Help please with gravitation problem

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