An object is lifted from the surface of a spherical planet to an altitude equal to the radius of the planet. as a result

 The correct answer is :  It happens that the mass remains the same but the weight decreases.

Explanation:  While the mass remains constant everywhere, the change in weight is due to the change occurred with gravity:

g '= g (1-2h / r)

As there is upward movement, the weight decreases because gravity decreases. Weight is inversely proportional to the square of the distance between the object and the center of the planet.

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles