Two projectiles are thrown with the same initial speed, one at an angle u with respect to the level ground and the other at angle 90 u. Both projectiles strike the ground at the same distance from the projection point. Are both projectiles in the air for the same length of time?

THE DARK SIDE OF NEWTON’S LAWS ● Newton’s Law is so good that even before two objects hit, their precise motion after they hit can be calculated exactly ○ their future positions are already predetermined by their pasts ● it doesn’t matter how many atoms are involved ● “Newtonian theory weaves a deterministic plot where every sigh results from the inexorable confluence of physical law” ● everything we imagine, think, feel, say, or do is predetermined by the previous motions of our atoms ○ everything we WILL do is already predetermined by the previous motions of our atoms ● determinism