Answer:
Before sled starts to move it has a potential energy due to the elevation...and then that potential energy converted to kinetic energy due to presence of a velocity...the sled will continue to move if their is no resesive force...but however friction force is presence that cause the sled to stop....
 
        
             
        
        
        
Actual Mechanical Advantage(AMA) = Weight / Force
Here, Weight = 764 N
Force = 255 N
Substitute the values in to the expression, 
AMA = 764 / 255
AMA = 2.99
After rounding-off to the nearest tenth value, it would be 3
Finally, option C would be your answer.
Hope this helps!
        
             
        
        
        
Acceleration = velocity/time
A= 3.5m/s/15s 
A= 0.23m/s^2
        
                    
             
        
        
        
Answer:
Dont worry ,
One day you will find the love of your life
Explanation:
 
        
                    
             
        
        
        
Answer:
2 seconds
Explanation:
The frequency of a wave is related to its wavelength and  speed by the equation

where
f is the frequency
v is the speed of the wave
 is the wavelength
 is the wavelength
For the wave in this problem,
v = 2 m/s

So the frequency is

The period of a wave is equal to the reciprocal of the frequency, so for this wave:

This means that the wave takes 4 seconds to complete one full cycle.
Therefore, the time taken for the wave to go from a point with displacement +A to a point with displacement -A is half the period, therefore for this wave:
