Question

Just as a car tops a 49 meter high hill with a speed of 77 km/h it runs out of gas and coasts from there, without friction or drag. How high, to the nearest meter, will the car coast up the next hill?

plzzz help!

Answers

77 km/h = 21.4 m/s
m•g•h+m•v^2/2 = m•g•H
H = h+v^2/2•g = 49 +(21.4)^2/2•9.8 =72.4 m

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