Question

if a planet existed whose mass was twice that of earth and whose radius 3 times greater,how much will a 1kg mass weigh on the planet??

class 9th ​

Answer 1

Answer:

2 kg mass will be sister because 3×1=3,

3-1 = 1

= 2kg mass will evaluate

Answer 2

Answer:

Let the mass and radius of earth be x and y respectively

So, the mass and radius of the planet will be 2x and 3y respectively.

Gravitational force on earth = G*(x*1) / y^2

Gravitational force on other planet = G(2x*1)/(3y)^2

We have to find the ratio of

(G on earth : G on other planet)

= G*x*1 / y^2 / G(2x*1)/(3y)^2

= 9:2 = 4.5

So, the weight of 1 kg on that planet will be equal to 4.5 kg weight on earth

Hope this helps you..