Explanation:
Joule (J) is the MKS unit of energy, equal to the force of one Newton acting through one meter.
 
        
             
        
        
        
      Using the Universal Gratitation Law, we have:
 
      Again applying the formula in the new situation, comes:
 Number 4
Number 4If you notice any mistake in my english, please let me know, because i am not native.
 
        
        
        
Before we dive into how electricity is used around the home it is worth putting household electricity use in perspective.
Household electricity use generally makes up about a third of total electricity consumption  in most developed nations.  Using data from the European Union we can give an example of how electricity demand is split among different sectors.
<span>
Read more at http://shrinkthatfootprint.com/how-do-we-use-electricity#DfE5FuAPpy6Z5TBH.99
</span>
 
        
             
        
        
        
Answer:
200 N = 200 Newtons
Explanation:
Just use the formula F = m*a
F = Force in Newtons
m = mass and is 20 kg
a = acceleration and is 10 m/s^2
F = 20 * 10
F = 200 Newtons.