Answer:
u = 104.68 m/s
Explanation:
given,
horizontal distance = 150 m
elevation of  12.4 m
angle = 8.6°
horizontal motion = x = u cos θ. t .............(1)
vertical motion = 
 ................(2)
................(2)
from equation(1) and (2)
 ..........{3}
..........{3}




u = 104.68 m/s
The initial speed of the ball is u = 104.68 m/s
 
        
             
        
        
        
Answer:
i think it is iron
Explanation:
its the only one that makes sense to me
 
        
                    
             
        
        
        
To find average speed, we divide the distance of travel (in this case, 400 metres) by the time she took, 32 seconds.  Therefore: 12.5 seconds is her average speed.
        
                    
             
        
        
        
Answer:
Explanation:
We will use the KE equation you wrote here and fill in what we are given:
 and isolating the m:
 and isolating the m:
 which gives us
 which gives us
m = .50 kg