KE = 1/2(100 kg)(100 m/s)^2 = 500000 Joules ----------------------- KE = 1/2(100 kg)(50 m/s)^2 = 125000 Joules ---------------------- 5â¦00000 Joules/125000 Joules = 4 ------ The kinetic energy is reduced by a factor of 4 because the speed is squared.
Earth, the fifth-largest of the eight planets in the Solar System belongs to the Milky Way galaxy and is orbiting about 28,000 light years from the center of the galaxy. It is believed that currently it lies about 20 light years above the galaxy's equatorial plane in the Orion spiral arm.
The Earth is inside the Milky Way Galaxy. The closest other known galaxies are the two clouds of Magellan, which are small galaxies that orbit the Milky way. The closest oth â¦ er large galaxy, about the size of the Milky Way, is the Andromeda Galaxy. Andromeda is the nearest galaxy to Earth.