100N describes the weight of the sandbag, while 100kg is the mass of the sandbag.
To calculate acceleration, divide your weight by the mass, thus the accleration is:
 
 
        
        
        
Answer:
a) The x coordinate of the third mass is -1.562 meters.
b) The y coordinate of the third mass is -0.944 meters. 
Explanation:
The center of mass of a system of particles ( ), measured in meters, is defined by this weighted average:
), measured in meters, is defined by this weighted average:
 (1)
 (1)
Where:
 - Mass of the i-th particle, measured in kilograms.
 - Mass of the i-th particle, measured in kilograms.
 - Location of the i-th particle with respect to origin, measured in meters.
 - Location of the i-th particle with respect to origin, measured in meters. 
If we know that  ,
,  ,
,  ,
,  ,
,  and
 and  , then the coordinates of the third particle are:
, then the coordinates of the third particle are:




a) The x coordinate of the third mass is -1.562 meters.
b) The y coordinate of the third mass is -0.944 meters. 
 
        
             
        
        
        
General relativity is the theory of space and time. This was theory was found by Albert Einstein 
        
                    
             
        
        
        
As you coast down a long hill on your bicycle, potential energy from your height is converted to kinetic energy as you and your bike are pulled downward by gravity along the slope of the hill. While there is air resistance and friction slowing you down by a little bit, your speed increases gradually until you apply the brakes, causing enough friction to slow yourself and the bike to a stop at the bottom.
A roller coaster will have higher kinetic energy at the lower hill because it will have already been moving as opposed to the initial hill. But I'm not one hundred percent certain. You can always google this stuff, but I do know for sure that at the first hill, the roller coaster will have higher potential energy.
Hope this helps!