(a) At position 2 the potential energy is 10,000 J and kinetic energy is 10,000 J.
(b) At position 3 the potential energy is 0 and kinetic energy is 20,000 J.
(c) At position 4 the potential energy is 5,000 J and kinetic energy is 15,000 J.
Kinetic and potential energy of the roller coaster
The kinetic energy and potential energy of the roller coaster is calculated as follows;
total height = 4 m
At position 2, vertical height = 2 m
P.E (2) = ¹/₂P.E (1) = ¹/₂(20,000 J) = 10,000 J
K.E (2) = 20,000 J - P.E = 20,000 J - 10,000 J = 10,000 J
At position 3, vertical height = 0 m
P.E (3) = 0
K.E (3) = 20,000 J
At position 4, vertical height = 1 m
P.E = mgh =
P.E (4) = 500 x 10 x 1 = 5000 J
K.E(4) = 20,000 J - 5000 J = 15,000 J
Learn more about kinetic energy here: https://brainly.com/question/25959744
#SPJ1