Answer:The coefficient of friction between the box and the floor,  = 1.456 × 10⁻²
Explanation:
 
        
             
        
        
        
Group 17 is the second column from the right in the periodic table and contains six elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (As), and (Ts). Astatine and are radioactive elements with very short half-lives and thus do not occur naturally.
 
        
             
        
        
        
Answer:
Check attachment for your answer 
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Answer:
the energy when it reaches the ground is equal to the energy when the spring is compressed.
Explanation:
For this comparison let's use the conservation of energy theorem.
Starting point. Compressed spring
          Em₀ = K_e = ½ k x²
Final point. When the box hits the ground
          Em_f = K = ½ m v²
since friction is zero, energy is conserved
           Em₀ = Em_f
           1 / 2k x² = ½ m v²
           v =  x
     x
Therefore, the energy when it reaches the ground is equal to the energy when the spring is compressed.
 
        
             
        
        
        
Okay, so they want to basically Increase their grip, and they are taking advantage of the force of friction