<span>An imaginary line perpendicular to a reflecting surface is called "a normal" (principle line)
So, Your Answer would be Option B
Hope this helps!</span>
Potential Energy
Potential energy is the energy an object has because of its position to move. Gravitational potential energy can be calculated by multiplying the mass of an object, the gravitational pull, and the height of the object together. In our project the weights, cups, marbles and dominos all have a potential energy as well as other objects.
Kinetic Energy
Kinetic energy is energy due to motion. To calculate this, use the equation KE=0.5mv^2. The work, potential energy, and kinetic energy of an object will always be equal to eat other. Kinetic energy can be calculated by any objects in motion on the machine, such as the marbles, car, and the dominos.
SRY I HAVE ONLY THIS MUCH OF INFORMATION ABOUT THIS............I ONLY HOPE THAT THIS WILL HELP YOU MATE.......
Blue, blue-white, Yellow-white, yellow, yellow-orange, and red. Hope this helps.
