Latent heat, energy absorbed or released by a substance during a change in its physical state (phase) that occurs without changing its temperature.
        
             
        
        
        
Please elaborate more on your question so I can help you
        
             
        
        
        
Answer:

Explanation:
using the law of the conservation of energy:


where K is the spring constant, x is the spring compression, N is the normal force of the block,  is the coefficiet of kinetic friction and d is the distance.
 is the coefficiet of kinetic friction and d is the distance.
Also, by laws of newton, N is calculated by:
N = mg
N = 3.35 kg * 9.81 m/s
N = 32.8635 
So, Replacing values on the first equation, we get:

solving for  :
:

 
 
        
             
        
        
        
Answer:
a) 141.6m
b) 8.4m/s
Explanation:
a) to find the total displacement you use the following formula for each trajectory. Next you sum the results:

hence, the total distance is 141.6m
b) the mean velocity of the total trajectory is given by:

hence, the mean velocity is 8.4 m/s