•   A small rubber ball is launched by a compressed$-$air cannon from ground level with an initial speed of $12\mathrm{.}4$ m$/$s directly upward. Choose upward as the positive direction in your analysis. 

 

•  $($a$)$ What is the maximum height above the ground that the ball reaches? 

 

$($b$)$ How long does it take to reach the maximum height? 

•  
• $($c$)$ How long does it take to reach the ground after it reaches its highest point? 
•  
• 
  
• $($d$)$ What is its velocity just before it hits the ground? $($Indicate the direction with the sign of your answer.$)$ 
•  
• 
  
• 
  
• 
  
  • 
    
    • 
      
      • 
        
        • 
          
          •