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A closer look…

Speed & Velocity. A closer look…. ?. ?. ?. ?. ?. ?. ?. ?. ?. ?. Recap. Speed. Lets make sure that you remember what speed and velocity are before we continue…. Velocity. Speed. Speed tells how fast an object is moving.

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A closer look…

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  1. Speed & Velocity A closer look…

  2. ? ? ? ? ? ? ? ? ? ? Recap Speed Lets make sure that you remember what speed and velocity are before we continue… Velocity

  3. Speed Speed tells how fast an object is moving. It is the distance traveled divided by the time it took to travel that distance. In other words…speed = distance/time Got it?

  4. Measuring Speed The SI unit for speed is m/s… or meters per second. PER Meters / second is used because… The SI unit for distance is METERS And the SI unit for time is SECONDS

  5. Other Units Some other units that are used to measure speed are… Miles per Hour

  6. Other Units Some other units that are used to measure speed are… Kilometers Per Hour

  7. Velocity + Now, about velocity. Velocity is just speed with direction. That’s all. Yeah, it’s simple…I know.

  8. Velocity Directions Now, when I say “direction”, I’m not talking about North, South, East & West only... Direction means ANY DIRECTION. It could be things like…

  9. Toward the river

  10. Down the street

  11. DUDE. OMG! Across the room This guy ALMOST dropped the deadly virus as he carried it across the room.

  12. Velocity So, when you are looking at a velocity, there are 2 parts: Speed & Direction For example… 10 m/sto the South

  13. UNITS • You should now what a unit is by now. • Don’t be STOOPID and get the wrong units when calculating speed. • Lets check your skill with units…

  14. Which of these would be a unit for speed? • Miles / foot • Miles / kilometer • Hours / meter • Feet / second

  15. Moving on… Now lets look at some ways that we use speed and velocity in our daily lives.

  16. Baseball! Everyone knows the point of baseball The batter tries to swing a bat and hit a ball thrown by the pitcher. The pitcher tries to throw the ball as fast as possible.

  17. Baseball! The faster the ball is moving, the harder it will be for the batter to hit it. The batter must figure out the right time to swing the bat.

  18. Bad timing… If he swings at the wrong time…

  19. HOMERUN! But, if he swings at the right time…

  20. Baseball! Most baseballs are thrown at an average speed of about 40 m/s. That is 90 mi/h!

  21. The Space Shuttle Lets look at something with a speed that is a little bit higher than that of baseballs.

  22. The Space Shuttle NASA used to regularly launch the Space Shuttle into outer space. How fast do you think the space shuttle had travel in order to make it to outer space?

  23. Space Shuttle Speed When it launched, the space shuttle moved at a speed of about 18,000 miles per hour! WOW!

  24. Space Shuttle Speed Once the shuttle made it into space, it started to circle the earth. This is called “going into orbit”. The space shuttle continued to move at about 18000 mph while in orbit.

  25. Space Shuttle Landing When it was time for the shuttle to land, it had find a way to decrease its speed. If it tried to land while moving at 18,000 mph, it would crash and burn!

  26. Space Shuttle Re-entry After the shuttle slowed down, it would be moving at about 360 mph when it finally landed.

  27. Asteroids! Lets continue the space theme with a look at objects that move even faster than the space shuttle…

  28. What is an asteroid? An asteroid is a fragment of rock that travels through outer space. Most asteroids in our solar system are located between the planets Mars & Jupiter. This area is called the “asteroid belt”.

  29. Rogue Asteroids However, some asteroids do not stay in the asteroid belt. Asteroids that travel freely through the solar system are called “Rogue Asteroids”.

  30. Rogue Asteroids! Rogue asteroids travel at an average speed of… Get ready for it… 56,000 Mph!

  31. Danger! Rogue asteroids can be very dangerous. If one of these asteroids hit Earth…

  32. Danger! Then the devastation would be incredible! It is believed that a Rogue Asteroid hit earth and caused the dinosaurs to become extinct. 

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