Physics Comic Strip on Free-fall

Physics Comic Strip on Free-fall

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  • You might think that because I'm not attached to anything, I'm falling freely...
  • This parachute is slowing me down because of air resistance, but my body is also subject to air resistance, which means I'll never truly free-fall on Earth.
  • Oh, did I mention that I'm also an astronaut?
  • So if skydiving ISN'T free-fall, what is? 
  • Welcome to space! I'm about to go on a spacewalk, isn't my spacesuit cool? I can't leave the station without it because there's no atmosphere outside.
  • Speaking of no atmosphere, I'm not experiencing any air resistance right now because there's no air!
  • v= (7800m/s) - (-9.81/m/s/s)*(60s)  v= (7800) - (-588.6) v= 8388.6m/s a=v/t  a= (8388.6m/s)/(60s) a= 139.81m/s/s
  • I can calculate my velocity as we enter Earth's orbit by using this formula; v=u-gt. Let's calculate the velocity of the spaceship after 1 minute together before we head back down to Earth.
  • And because there's no air, the only force acting on me is the gravity from the sun that keeps us in orbit. That means I'm technically in free-fall!
  • I'm about to go back to Earth. When we enter Earth's orbit, gravity will act upon us at a rate of 9.8m/s. If we neglect the atmosphere and air resistance, we would be entering Earth in a free-fall!
  • Let's name some examples of free-fall together, neglecting air resistance on Earth. Yes, that's right! Dropping a ball, and skydiving are both examples of free-fall when neglecting air resistance. Well done!
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