1. The problem statement, all variables and given/known data I have a physics question that deals with power. In this problem it is of a roller coaster moving from 7m above ground to a point that is 90m above the ground. 1. What is the power needed for a roller coaster that needs to move 127m and is moving at a velocity of 3.5m/s? The mass of the vehicle is 2375kg and and retarding force on the train is 4225N. M= 2375kg F= I am not sure if it includes the 4225N or if I need to find it another way D= 127 T=?? 2. Relevant equations Power= Work/Time Work= Force * Displacement Velocity= change in displacement/ time 3. The attempt at a solution I did 4225*127/ 36.28 but I am not sure if the force is correct or the time....can someone please help!!