Answer:
240cm
Explanation:
Speed = 6cm/s
Time = 40 seconds
Speed= distance/time
6cm/s = distance/40seconds
Distance = 6×40
Distance = 240cm
Hence, in 40 seconds, the ball must have rolled the distance of 240cm
 
        
             
        
        
        
Answer : The static friction depends on two factors 
1. Roughness of the surface
2. Force
Explanation : Friction occur when surface is not smooth.
The formula of friction is

 Static friction depends on the roughness of the surface and force which is trying to push to object along the surface.
Static friction is caused by the attraction between two surfaces that are in contact.  when the surface will rough and the object will heavier then the force will be larger.
 
        
             
        
        
        
Answer:
Bar graph 
Explanation:
each day collects data so a bar graph would work.
 
        
                    
             
        
        
        
deceleration or rėtardation i’m pretty sure (it won’t let me say the second word but it’s correct) 
 
        
                    
             
        
        
        
It would be 12hz because it