Question

a body has a weight W on surface of earth what is weight on a planet whose mass is 1p times that radius of 4 times that radius of earth​

Answer 1

Explanation:

We know g = G  M /r^2

M= mass of planet, r is radius

on Earth it's about 10

on new planet g = 1/7 times ( due to mass is less) and 4 times (due to radius, remember square)

so basically 4/7 times g of Earth

g = 4/7 g

Weight = mg (m = mass of object, g is gravitational acceleration of that particular planet)

Weight on new planet = 70 * 4/7 g

=40 g

about 400 N (if taking g=10)

= 392 N (if taking g=9.8)

******@@@@@Good luck.@@@@*****.....