Answer:

Explanation:
 = Force on one side of the door by first waiter = 257 N
 = Force on one side of the door by first waiter = 257 N
 = Force on other side of the door by second waiter
 = Force on other side of the door by second waiter
 = distance of first force by first waiter from hinge = 0.567 m
 = distance of first force by first waiter from hinge = 0.567 m 
 = distance of second force by second waiter from hinge = 0.529 m
 = distance of second force by second waiter from hinge = 0.529 m 
Since the door does not move. hence the door is in equilibrium
Using equilibrium of torque by force applied by each waiter

 
        
             
        
        
        
Time = distance / speed
T = 125/ 5
T = 25 meters per second
        
             
        
        
        
Answer:
a = 2d / t²
Explanation:
d = ½ at²
Multiply both sides by 2:
2d = at²
Divide both sides by t²:
a = 2d / t²
 
        
             
        
        
        
<span> energy produced by flow of electric charge describes a electrical energy
because movement of electric charge do effect the work on system 
so correct option is B 
hope it helps</span>
        
                    
             
        
        
        
Answer: 
The ball impact velocity i.e(velocity right before landing) is 6.359 m/s
Explanation:
This problem is related to parabolic motion and can be solved by the following equations:
 ----------------------(1)
----------------------(1)
 ---------(2)
---------(2)
 ----------------------- (3)
 ----------------------- (3)
Where:
x = m is the horizontal distance travelled by the golf ball
 is the golf ball's initial velocity
 is the golf ball's initial velocity
 is the angle (it was  a horizontal shot)
 is the angle (it was  a horizontal shot)
t is the time
y is the final height of the ball
 is the initial height of the ball
 is the initial height of the ball
g is the acceleration due gravity
V is the final velocity of the ball
Step 1: finding t 
Let use the equation(2)


 s
s 
Substituting (6) in (1):
 -------------------(4)
-------------------(4)
Step 2:  Finding  :
:
From equation(4)


 m/s (8)
 m/s (8)  
Substituting  in (3):
 in (3):
 
 
v =42 .01 - 15.3566  
V=26.359 m/s