Aroller coaster reaches its maximum kinetic energy when it. a) reaches the bottom of a hill. b) begins rolling down a hill. c) is sitting at the top of a hill. d) is starting up a hill.

A roller coaster reaches its maximum kinetic energy when it : A. reaches the bottom of the hill

It will reach its maximum kinetic energy at the point where it reach maximum speed. Due to the help of Gravity, it reach maximum speed when it reach the bottom of a hill (the speed will be reduced when the Roller Coaster is going up)

hope this helps

Answer: buoyancy forceexplanation: in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.