Explanation:
For 787 dreamliner airplane,
Mass, 
Height, 
Potential energy of 787 dreamliner airplane is given by :

For a boeing 747,
Mass, 
Height, 
:
Potential energy of a boeing 747 airplane is given by

So, the potential energy of a boeing 747 airplane is more than the 787 dreamliner airplane.
According to newton's second law of motion F=ma , but here we have to find a so a=f/m ,a=8.11/1028=0.007m/sec² or 7×10‐3m/sec2
Answer:
Because the Moon casts a smaller shadow than Earth does, eclipses of the Sun tightly constrain where you can see them. If the Moon completely hides the Sun, even for a moment, the eclipse is considered total.
Explanation: