Question About Jumping

Classical Mechanics Level 2

Suppose you are standing still and upright, and you decide you want to jump into the air. Why do you have to bend your legs first?

To hyper-oxygenate your bloodstream in the denser air beneath, in preparation for physical exertion To take advantage of the change in gravitational potential energy To store energy in your legs like springs So that work can be done on your equivalent center of mass as you move upward again

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

Used and loved by over 7 million people

Learn from a vibrant community of students and enthusiasts, including olympiad champions, researchers, and professionals.