in an amusement park ride a cart of mass 300kg and carring four passangers each of mass 60kg is dropped from a vertical height of 120m alonga path that leads into a loop-the-loop machine of radius 30m. The cart then enters a straight stretch from A to C where friction brings it to rest after a distance of 40m. (see attachment) a) find the velocity of the cart at A answer: mgh = (1/2)mv² 540 x 10 x 120 = (1/2) x 540 x v² Thus, v = 48.99 m/s b) find the reaction force from the seat of the cart onto a passanger at B. answer: well at the top the net force will be euqual to the weight and the normal force, but what reaction force are they talking about here. i mean there isnt any force pushing onto the seat is there? c) what is the acceleration experienced by the cart from A to C (assumed constant)? answer: ???