Posted by Lynn on .
A roller coaster mass of 291 kg starts stationary at point A where height 1 = 37 m, and a while later is at B, where height 2 = 11.4 m. The acceleration of gravity is 9.8 m/s^2. What is the speed of cart at B ignoring the effect of friction?

Physics 
Elena,
mgHmgh= mv²/2
v=sqrt{2g(Hh)} = …