From the gravitational law, calculate the weight W (gravitational force with respect to the earth) of a 70 kg spacecraft traveling in a circular orbit 275 km above the earth's surface. Express W in Newtons and pounds.

The  value in Newton is

The  value in pounds is    

Explanation:

From the question we are told that

  The  mass of the spacecraft is  

   The distance above  the earth is  

Generally the gravitational force with respect to the earth is mathematically represented as

Here is the mass of earth with value

        is the radius of the earth with value  

   G is the gravitational constant with value

So

Converting to  pounds

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j