A cannon with barrel velocity of 150 m/s launches a cannonball horizontally from an elevated position on a pier . Neglecting air resistance , determine the velocity of the cannonball after 3 seconds ? Determine how fat vertically will the cannonball have fallen after 3 seconds ?

Physics for Scientists and Engineers, Technology Update (No access codes included)
9th Edition
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter4: Motion In Two Dimensions
Section: Chapter Questions
Problem 4.7OQ: A projectile is launched on the Earth with a certain initial velocity and moves without air...
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A cannon with barrel velocity of 150 m/s launches a cannonball horizontally from an elevated position on a pier . Neglecting air resistance , determine the velocity of the cannonball after 3 seconds ? Determine how fat vertically will the cannonball have fallen after 3 seconds ?
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Step 1

The vertical component of the velocity of the particle is

vy=v0y-gt=0-9.8 m/s23.0 s=-29.4 m/s

The negative sign represents the velocity towards the earth or downward.  

 

 

  

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