In this case the player is compressing muscles in his legs which then can be expanded to produce kinetic energy. The energy stored in the muscles would be a form of elastic potential, but I don't think it is quite the same as winding up a rubber band, because the muscles actually produce energy as well as release stored energy. You might get a better explanation from section Human Physiology.
stariods
Because jumping in place wont get you very far. To generate and store energy just before the leap. this gets them higher threshold velocity
because there are to types of energy. one type is the force of and the motion
I got this in my exam, and the answer is B) releasing a compressed spring as it a transformation from potential to kinetic
Right at/before contact with the water's surface (if they are jumping form a high point)
they use energy by jumping and swimming
It is the conversion of potential energy into kinetic energy.
i got to say jumping
Stairs make it easier to get from one level to another level with using less energy.
Yes but not both at the same time. All energy is conserved, therefore energy before equals energy after. For example jumping from a ten metre diving board you have gravitational potential energy as you are fulling gravitational potential energy is converted to kinetic energy.
Another AQA question! Think what birds do... they Fly (1) and Eat (2)
Jumping off a tall cliff.