Projectile Motion
*Object, moving in gravitational field, with gravity only force acting on it - moves in a parabolic shape
*Measured in two independent dimensions
oVertical - gravity effects
oHorizontal - remains constant though-out motion
*Galileo - formulas for projectile motion
oS = UT - Horizontal motion
oS = UT + ½ AT2 - Vertical motion
Galileo analysis of Projectile motion
*Trajectory of projectile makes a parabolic shape
*Led him to consider reference frames
*Opponent believed in idea of geocentrism - stone would be left behind if Heliocentric
*Galileo explained - didn't fall away because shared the earths motion
oTower and stone shared the same horizontal velocity
oExperiment - dropped object from crows nest of ship - dropped down to base of tower whether stationary or moving at a constant velocity
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