Projectiles

• Fill in the values for horizontal and vertical acceleration:

  A) 0

  B) -g

  
• In projectiles questions, how are the vertical and horiztonal accelerations connected?

  t
• If you want to find the speed and direction of a projectile, you:

  1. find the horizontal speed
  2. find the vertical speed
  3. use pythagoras with horizontal + vertical to find speed
  4. find the direction using the right angle triangle from #3
• To find the horizontal speed of a projectile you do:

  speed = distance / time
• To find the vertical speed use SUVAT
• If you want to find the direction of a projectile, use the inverse tan on the right angle formed of the horizontal speed, the vertical speed
• How do you label different directions in vectors?

  
  

  North-east: $\left(\frac{1}{1}\right)$

  South-east: $\left(\frac{1}{-1}\right)$

  North-west: $\left(\frac{-1}{1}\right)$

  South-west: $\left(\frac{-1}{-1}\right)$
• Label the signs - how does i relate to j in each direction?

  A) -

  B) +

  C) -

  D) +

  
• What does "moving in the direction of $\left(_b^a\right)$ mean?

  
  

  moving at $k\left(_b^a\right)$
• How do you label different directions in vectors?

  
  

  North-east: $\left(_1^1\right)$

  South-east: $\left(_{-1}^1\right)$

  North-west: $\left(_1^{-1}\right)$

  South-west: $\left(_{-1}^{-1}\right)$