It's gravity I believe? I'm not entirely sure.
        
                    
             
        
        
        
Answer:
The value is 24meters
Explanation:
Using
r= xi+yj
To get the magnitude of vector x
We say 
/r/= √x²+y²
So 
30²= √18² + y²
y= √576
Y= 24m
 
        
             
        
        
        
Answer:
Explanation:
Newton's Gravitation Law

where G is a constant, M and M the masses e d the distance betwen masses.

 
        
             
        
        
        
Answer:
Power = 130 watt
Explanation:
Power is described as the ability to do work, it is also defined as the amount of work in Joules done in a given time in seconds. Mathematically, it is represented as:

In this example, power is calculated as follows:
Work = 39000 J
Time = 5 minutes
 converting the time from minutes to seconds:
1 minute = 60 seconds
∴ 5 minutes = 60 × 5 = 300 seconds

N:B the unit for power can also be represented as Joules/seconds or J/s or JS⁻¹
 
        
             
        
        
        
The movement of the planets and other celestial bodies in the solar system is actually caused by the sun's gravitational pull or force.
Just like the moon orbits the earth because of the gravitational pull by the earth so does gravitational pull by the sun causes planets' and other celestial bodies' orbit.