Posted by Leah on .
If a bobsled with a total mass of 250kg, reaches the bottom of the hill at a speed of 92mph, how tall was the hill?
I do not understand how to create the formula. I know that 92mph = 134.933 ft per second & that 1 mile = 5280 ft. Would I take the (92)mph x (5280) ft per mile = (485760ft) and divide it by 1 hour (3600 secs.)? That would give me 134.933 ft.

Physics 
bobpursley,
Work in SI units.
92 mph = 41.12768 meters / second
mgh= 1/2 m (41.13^2)
h= 1/(2g) * 41.13^2)
g= 9.8m/s^2