# Physics 141 1 PHYSICS 141 CHAPTER 4 LECTURE #2 PROJECTILE MOTION.

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Physics 141 1 PHYSICS 141 CHAPTER 4 LECTURE #2 PROJECTILE MOTION

Physics 141 2 X Y V0V0 0

3 Two dimensional motion: y-direction: x-direction:

Physics 141 4 VxVx VyVy PROJECTILE MOTION Y X

Physics 141 5 Equations of Motion Horizontal Motion:

Physics 141 6 Vertical Motion

Physics 141 7 Vertical Motion

Physics 141 8 Firing rockets from a fighting jet h = 2 km v= 600 km/h x = ?

Physics 141 9 Solution:

Physics 141 10 THE STUPID MONKEY x vovo 0 h

Physics 141 11 EQUATION OF MOTION FOR THE BULLET

Physics 141 12 FOR THE MONKY

Physics 141 13 When they meet,

Physics 141 14 EQUATION OF THE PROJECTILE PATH

Physics 141 15 X 0 = 0 AND Y 0 = 0 AT T = 0, THEN X Y

Physics 141 16 THE HORIZONTAL RANGE X Y R

Physics 141 17 MAXIMUM HEIGHT: X Y H

Physics 141 18 Example: Which reaches the ground first? h

Physics 141 19 h For the bullet:

Physics 141 20 For the stone: h

Physics 141 21 BOTH REACH GROUND AT THE SAME TIME At any time t, both will be at the same height

Physics 141 22 throwing a bottle upward while driving a car at constant velocity, will the bottle smash your head!! Example:

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