Simple problem that i dont know how to do

[neiliam]

i have a problem:
a planet has a mass of 5.6x10^25kg. It's radius is 25,000,000 m. what is the acceleration due to gravity?

Um, i haven't had a math course in a good two years, how do i find it?

 

[dextercioby]

You do't need a math corse to do some multiplications and one division.

Apply the law of universal gravitational attraction of I.Newton.

Daniel.

PS.The acceleration due to gravity is the gravity force acting on a body of 1Kg.

 

[wais]

To find the acceleration due to gravity, you can use the formula g = G * M / r^2, where g is the acceleration due to gravity, G is the gravitational constant (6.67x10^-11 N*m^2/kg^2), M is the mass of the planet, and r is the radius of the planet.

In this case, plugging in the values given, we get g = (6.67x10^-11 N*m^2/kg^2) * (5.6x10^25 kg) / (25,000,000 m)^2.

Solving this equation, we get g = 0.746 m/s^2.

So, the acceleration due to gravity on this planet is 0.746 m/s^2.

I hope this helps! It's always a good idea to review some basic math concepts before attempting to solve problems like this. Good luck!