Calculate acceleration due to gravity on a different planet

prg SG

Acceleration due to gravity (g) on earth's surface is 9.8m/s^2.
Calculate acceleration due to gravity on a plant which has
(a) same mass and twice radius
(b) same radius and twice density
(c) half radius and twice density

show your working...

16/f/lonely SG

This one is manipulation of your equations...

prg SG

yes i know that but could any one please solve it.

I guess the main equations are required (as i have "manipulated" ...lol XD )

for (a) g proptional to 1/R^2

for (b) g proptional to M

for (c) g proptional to M/R^2

eagle SG

yes i know that but could any one please solve it.

I guess the main equations are required (as i have "manipulated" ...lol XD )

for (a) g proptional to 1/R^2

for (b) g proptional to M

for (c) g proptional to M/R^2

You have provided the answers yourself.

The remaining to be done is basic O level E maths proportions questions.

Try it first.

A level physics is a lot of calculations... The physics of it is coming up with the correct equations; the remaining is maths.