N10_presentation

# N10_presentation - Projectile Motion Simple Projectile: an...

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Projectile Motion

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Simple Projectile : an object that moves in such a way that g is constant (in magnitude and direction) and air drag is unimportant.
Galileo’s Insight the …motion which I call projection is compounded of one which is uniform and horizontal and of another which is vertical and naturally accelerated…and describes a path which is a semi-parabola.”

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(N10T.4) As a projectile moves along its parabolic trajectory, which of the following remain constant (ignoring air resistance, and defining the z axis to point upward)? (A) Its speed. (B) Its velocity. (C) Its x-velocity and y-velocity. (D) Its z-velocity. (E) Its acceleration. (F) Its x-velocity, y-velocity, and acceleration. (T) Some other combination of the given quantities.
A tennis ball is dropped from rest at the exact same instant and height that a bullet is fired horizontally. Which hits the ground first (neglecting air resistance)? (A)

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## This note was uploaded on 04/17/2008 for the course PHYS 120 taught by Professor Decarlo during the Spring '08 term at DePauw.

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N10_presentation - Projectile Motion Simple Projectile: an...

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