Asmall planet having a radius of 1000 km exerts a gravitational force of 100 n on an object that is 500 km above its surface. if this object is moved 500 km farther from the planet, the gravitational force on it will be closest to a) 71 n. b) 25 n. c) 56 n. d) 50 n. e) 75 n.

Option C is the correct answer.

Explanation:

Gravitational force is given by

                 

         G=6.674×10⁻¹¹ m³⋅kg⁻¹⋅s⁻²

         M = Mass of object 1

          m = mass of object 2

          r = Distance between objects.

Here only variable is r value.

In case 1

             

In case 2

           

Option C is the correct answer.

Julia would be observing a. static electricity was caused by her sweater rubbing against her shirt and transferring electrons. she didn't touch anything metal, so that would cancel out b.she most likely didn't rub her sweater against her hair either, so that cancels out c.she also didn't scoot across the carpet while trying to take her sweater off, that cancels out d.so that leaves a.a. is correct.