The acceleration should 5.4 m/s^2
        
             
        
        
        
Answer:
 F = 2,894 N
Explanation:
For this exercise let's use Newton's second law
       F = m a
The acceleration is centripetal
      a = v² / r
Angular and linear variables are related.
      v = w r
Let's replace
      F = m w² r
The radius r and the length of the rope is related
     cos is = r / L
     r = L cos tea
Let's replace
     F = m w² L cos θ
Let's reduce the magnitudes to the SI system
      m = 101.7 g (1 kg / 1000g) = 0.1017 kg
       θ = 5 rev (2π rad / rev) = 31,416 rad
      w =  θ / t
      w = 31.416 / 5.1
      w = 6.16 rad / s
      F = 0.1017 6.16² 0.75 cos  θ
      F = 2,894 cos  θ
The maximum value of F is for  θ equal to zero
      F = 2,894 N
 
        
             
        
        
        
The physical changes are you are breaking down the food u eat and the chemical changes are when the enzymes in your stomach break down the food that you have already eaten