Fairly easy question but I'm a douchenozzle (1 Viewer)

[VenomP]

Mars is approximately 0.1x the weight of Earth, and has approximately 0.5x the diameter of earth. What is the approximate force due to gravity on Mars?

Answer: 4m/s^2

 

[darkchild69]

g = Gm/(r^2)

g earth is approx 10

(g earth / g mars) = (m/r^2)earth / (m/r^2)mars

g mars = g earth * (1/10) / (0.5^2)

= 10*(1/10)*4

= 4

Sorry, can't set out the working amy better on my phone, LOL

 

[helper]

Do you mean force due to gravity or acceleration?

a proportional to m, so 0.1x
a inversely proportional to r squared, so 1/0.5 squared times

So 9.8*0.1*(1/0.5^2) = 3.92

 

[pman]

clearly he means acceleation due to gravity, look at the units for the answer!

f=Gm/r^2

plug in values
put in calculator
write down answer

 

[mitchy_boy]

plug in values
put in calculator
write down answer

if only everything in life was that simple

 

[pman]

if only everything in life was that simple

It is if you know where to look