Answer:
F n = 0.2 N
Explanation:
given,                                      
you are exerting force of 10 N on the ball.
mass of the ball = 1 kg              
acceleration due to gravity  = 9.8 m/s²
normal force on the ball = ?          
normal force is force exerted by the object to counteract the force from other object.                 
normal force acting on the ball will be
F n = F - mg                           
F n = 10 - 1 × 9.8                         
F n = 10 -9.8                    
F n = 0.2 N            
Hence, normal force acting on the ball is equal to 0.2 N
 
        
             
        
        
        
Total internal reflection complete reflection of a ray of light within a medium such as water or glass from the surrounding surfaces back into the medium. The phenomenon occurs if the angle of incidence is greater than a certain limiting angle, called the critical angle.
        
                    
             
        
        
        
Streamline
Effect
Drag
Parachutes 
Surface area 
Friction 
Air 
Water
        
             
        
        
        
With an increase of predators, then the population will most likely decrease over the span of 5 years.