Velocity=frequency(wavelength)
24m/s=f(2m)
24/2=f(2)/2
12Hz=f
        
             
        
        
        
I believe the answer is B. that's where the asetroid belt is.
        
                    
             
        
        
        
Let us consider body moves a distance S due to the force F.
Hence the work by the body W = FS
If the force is not along the direction of displacement,then the work by a body for travelling a distance S will be -
                                        ![W=[ Fcos\theta]*S](https://tex.z-dn.net/?f=W%3D%5B%20Fcos%5Ctheta%5D%2AS) where
  where     is the component of the force along the direction of displacement.
 is the component of the force along the direction of displacement.
                                   
                                                         
As per the question the power P is given as -
                                                   
                                                          
                                                          
                                                          
Hence alternative definition of power P = F.V
 
        
                    
             
        
        
        
But we do not know whether the force is pushing or pulling (the same direction (both forces are parallel) but: .........[ ]<-F-- or .......[ ]--F-->). I suppose the correct answer is B