Please i’m begging literally anyone to help me with this. it was due 30 minutes ago a roller coaster travels 6 meters in 3 seconds what is thr kinetic energy of the coaster if its 250 kg

a. 14700 J
b. 4500 J
c. 750 J
d. 500 J

Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.