I will explore the energy conversion in a kangaroo's powerful jump. The jump illustrates the transformation of potential to kinetic energy. "Crouching" helps the kangaroo store elastic potential energy in its tendons and muscles. The stored energy gets transformed into kinetic energy ( 2 ), during the impulsive push-off, propelling it into the air, where kinetic energy is transformed into gravitational potential energy g =). Conservation of energy highlights the efficiency of kangaroo physiology. For instance, a 70 kg kangaroo that jumps 2 m high gainsg =)=70x 9.8 x 2 =1372J Its muscles and tendons must provide at least as much energy, illustrating how its body has been adapted to store and release energy efficiently to move. This principle is applied by a basketball player performing a vertical jump. The player squats (loading potential energy) and then forcibly straightens their legs, converting that energy to kinetic energy for lift. For a 90 kg player achieving a 0.8 m vertical jump: g =)= 90 x 9.8 x 0.8 =1372J This calculation quantifies the minimum energy generated by the muscles of the player, explaining the reason why plyometric training raises vertical jump height