If the horse and rider have a combined mass of 572 kg what force would be required to accelerate them 5 kph per second

   Force required to accelerate = 794.44 N

Explanation:

 Force required = Mass of horse x Acceleration of horse

 Mass of horse and rider, m=   572 kg

 Acceleration of horse and rider, a = 5 kph per second

  Force required = ma

                             = 572 x 1.39 = 794.44 N

  Force required to accelerate = 794.44 N

Explanation:

From the question we are told that

    The  number of slits per cm is  k =  

    The order of the maxima is  n =  1

    The wavelength are  

The  spacing between the slit is mathematically represented as

=>      

=>        

Generally the condition for constructive interference is  

At  

At