183_notes:examples:finding_the_range_of_projectile

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183_notes:examples:finding_the_range_of_projectile [2014/07/23 05:36] – pwirving183_notes:examples:finding_the_range_of_projectile [2015/09/17 12:16] (current) – caballero
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 ===== Example: Finding the range of a projectile ===== ===== Example: Finding the range of a projectile =====
  
-In the previous example of [[183_notes:examples:finding_the_time_of_flight_of_a_projectile|time of flight]], the out of control bus is forced to jump from a location $\langle 0,40,-5 \rangle$m with an initial velocity of $\langle 80,7,-5 \rangle m/s^{-1}$. We have now found the time of flight to be [[183_notes:examples:finding_the_time_of_flight_of_a_projectile|9.59s]] and now want to find the position of where the bus returns to the ground. +In the previous example of [[183_notes:examples:finding_the_time_of_flight_of_a_projectile|time of flight]], the out of control bus is forced to jump from a location $\langle 0,40,-5 \rangle$m with an initial velocity of $\langle 80,7,-5 \rangle m/s^{-1}$. We have now found the time of flight to be [[183_notes:examples:finding_the_time_of_flight_of_a_projectile|3.65s]] and now want to find the position of where the bus returns to the ground. 
  
 === Facts ==== === Facts ====
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   * The acceleration due to gravity is 9.8 $\dfrac{m}{s^2}$ and is directed downward.   * The acceleration due to gravity is 9.8 $\dfrac{m}{s^2}$ and is directed downward.
   * The bus experiences one force - the gravitational force (directly down).   * The bus experiences one force - the gravitational force (directly down).
-  * The bus takes [[183_notes:examples:finding_the_time_of_flight_of_a_projectile|9.59s]] to reach the ground (from previous problem)+  * The bus takes [[183_notes:examples:finding_the_time_of_flight_of_a_projectile|3.65s]] to reach the ground (from previous problem)
  
 === Lacking === === Lacking ===
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 Plug in respective values for variables. Plug in respective values for variables.
  
-$$ = 0 + 80m/s(9.59s)$$+$$ = 0 + 80m/s(3.65s)$$
  
 Compute range in x-direction. Compute range in x-direction.
                
-$$ = 767m$$+$$ = 292m$$
  
 Repeat same process for the z-components: Repeat same process for the z-components:
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 Plug in respective values for variables. Plug in respective values for variables.
          
-$$ = -5 + -5m/s(9.59s)$$+$$ = -5 + -5m/s(3.65s)$$
  
 Compute range in z-direction. Compute range in z-direction.
              
-$$ = -52.95$$ +$$ = -23.25m$$ 
  
 Write range(final position vector) using all components:      Write range(final position vector) using all components:     
                
-Final position = $$\langle 767,0,-52.95 \rangle m $$ +Final position = $$\langle 292,0,-23.255 \rangle m $$ 
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  • Last modified: 2014/07/23 05:36
  • by pwirving