A4 kilogram cat is resting on top of a bookshelf that is 2 meters high. what is the cat's gravitational potential energy relative to the floor if the acceleration due to gravity is 9.8 m/s2?
a. 6 j
b. 8 j
c. 20 j
d. 78

What is the maximum acceleration of the wing tips, in units of g?

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great.d) about 10 times as great.

Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j