If a roller coaster train has a potential energy of 1,500 J and kinetic energy of 500 J as it starts to travel downhill, its total energy is___J.

Once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 J, and its potential energy decreases to ___J.

When the train reaches the bottom of the track and is traveling along the ground, its kinetic energy is___J.

diagram is missing, but i will try to explain your doubt.

answer:

amplitude is the maximum displacement or distance moved on a point of a vibrating body or wave measured from its equilibrium position.it is equal to half the length of vibration path.

battery with hi vtge high val resist in series

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.