Homework Help: physics

Posted by 18 on Sunday, April 15, 2012 at 6:10am.

Just as a car tops a 51 meter high hill with a speed of 84 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?

physics - Elena, Sunday, April 15, 2012 at 12:11pm
v =84 km/h= 23.33 m/s.

mv^2/2+mgh = mgH.
H = h +v^2/2g =51 +27.78 =78.78 m.

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