Question

1.) What would a person who weighs 625N on Earth weigh on a planet that has the same mass as Earth but half its radius?

2.) A man whose mass is 95kg on Earth’s surface is in a spacecraft at a height of twice Earth’s radius (that is, R is 3 Earth radii) above Earth’s surface. What is his mass (not weight) there?

Answer 1

Below

Step-by-step explanation:

1) Gravity force =~ m1 m2 / r^2 now half the radius

= m1 m2 / ( 1/2r)^2 = 1/4 m1m2/r^2 so the force will be 1/4

625 * 1/4 = 156.25 N

2) mass does not change..it is a measure of the amount of mass an object has .... it will still be 95 kg