On an alien planet, an object moving at 4.0 m/s on the horizontal ground comes to rest after traveling a distance of 10 m. if the coefficient of kinetic friction between the object and the surface is 0.20, what is the value of g on that planet?

So acceleration due to gravity is

Explanation:

We have given initial speed of the object u = 4 m/sec

As object finally comes to rest so final speed v = 0 m./sec

Distance traveled s = 10 m

From third equation of motion we know that

Coefficient of kinetic friction

We know that relation between acceleration and coefficient of kinetic friction

So acceleration due to gravity is

the answer is 12 as i may remember

: )