Figure given below shows part of a roller coaster ride seen from the side
The mass of the car is 580kg. The car gains 39000J of gravitational potential energy as it climbs from P to Q. (g= 10m/s2)
(i) Calculate the height h, (shown in Figure )
(ii)The car enters a pool of water at R. It slows down and stops at S. Describe how the total energy of the system is conserved as the car travels between R and S.
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