11-Projectiles 3 - Relative velocity

11-Projectiles 3 - Relative velocity - Projectile motion...

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Unformatted text preview: Projectile motion (cont’d) Physics 102 Projectile Motion 3 Slide 1 Department of Physics, The University of Arizona Question: How do projectile velocity and speed depend on height? Projectile motion (cont’d) Conceptual Example Two Ways to Throw a Stone From the top of a cliff, a person throws two stones. The stones have identical initial speeds, but stone 1 is thrown downward at some angle above the horizontal and stone 2 is thrown at the same angle below the horizontal. Neglecting air resistance, which stone, if either, strikes the water with greater speed? Compare trajectories: Stone 2 returns to the starting height at P From there both stones follow similar paths They hit the water with equal speed and velocity If the two stones’ initial angles are unequal, their initial velocity components will be unequal ( 29 2 2 2 v v g y y =-- Yet for projectile motion ( a y = - g and a x = 0) A more complicated case… In the previous example, what if the stones were thrown with the same initial speed but at unequal angles?the same initial speed but at unequal angles?...
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This note was uploaded on 09/07/2009 for the course V SC 315 taught by Professor - during the Spring '09 term at Arizona.

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11-Projectiles 3 - Relative velocity - Projectile motion...

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