A wagon is pulled at an angle of 30 degrees to the horizontal.
KE = 1/2 x 80 x 60^2
KE = 144000
The atom is the most basic unit of matter
All magnets have north and south poles. Opposite poles are attracted to each other, while the same poles repel each other. When you rub a piece of iron along a magnet, the north-seeking poles of the atoms in the iron line up in the same direction. The force generated by the aligned atoms creates a magnetic field.
