Have your partner hold one end of the phone cord or attach it firmly in place at about waist height. Stretch the phone cord to a length between 3 and 5 meters. Jerk the hand holding the cord to the right about one handspan, about 25 cm, then immediately return your hand to its original position. Notice that a rightward pulse travels down the cord. A leftward pulse returns down the cord after bouncing at the far end.
Motion moves down the cord, the motion of bits of the cord to the right and back.
In addition, Energy, moves down the cord. The kinetic energy of the parts of the cord moving side to side plus the potential energy of the deformed cord. Your partner could absorb the energy of the pulse and use it to do work. Momentum moves down the cord. When the pulse reaches the end of the cord it exerts a force on the end to the right and then back to the left because the pulse carries sideward momentum.