Answer:
Workdone = 1960 Joules. 
Explanation:
Given the following data;
Mass = 5kg
Force = 49N
Height (distance) = 40m
To find the workdone;
Workdone = force * distance 
Substituting into the equation, we have;
Workdone = 49*40
Workdone = 1960 Joules.
Therefore, the amount of work done on the bowling ball to lift it is 1960 Joules. 
 
        
             
        
        
        
Potential energy is the store she energy from an object this could include rubber bands. Kinetic energy is the energy that deals with motion a good example is a person running 
 
        
                    
             
        
        
        
The wave length becomes shorter and the pitch becomes higher
        
                    
             
        
        
        
Explanation:
8 m × (1000 mm / m) = 8000 mm
 
        
             
        
        
        
I believe it is speed. 
Hope this helps!