The angular speed can be solve using the formula:
w = v / r
where w is the angular speed
v is the linear velocity
r is the radius of the object
w = ( 5 m / s ) / ( 5 cm ) ( 1 m / 100 cm )
w = 100 per second
        
                    
             
        
        
        
Answer:
The extension of the second wire is   
Explanation:
From the question we are told that 
     The length of the wire is 
      The elongation of the wire is  
         The tension is 
        The length of the second wire is  
       
Generally the Young's modulus(Y) of this material is  
         
Where 
     Where A is the area which is evaluated as  
            
   and   
    So 
         
Since the wire are of the same material Young's modulus(Y)  is constant 
 So we have  
               
               
Now the ration between the first and the second wire is 
          
Since tension , radius are constant 
    We have 
            
substituting values 
           
           
          
           
 
        
             
        
        
        
B.Electromagnetic 
explanation:
        
             
        
        
        
Answer:

Explanation:
When the springs are connected end to end, it means they are connected in series. When the springs are connected in series, the stress applied to the system gets applied to each of the springs without any change in magnitude while the strain of the system is the sum total of strains of each spring. The spring constant of the resultant system is given as,

Here, n = 10
Spring constant of each spring = k
Thus,



