Newton's laws do not predict the motion of all objects. The motion of which of the objects below does not obey Newton's laws? A a car sliding on ice
B Jupiter's moons
C a pendulum swinging
D The electrons in a hydrogen atom

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong chain

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f

Why does lightning travel from clouds to the ground?