density, ρ of the rock is 4000 kg m−3 and that this density is uniform throughout. You have equipment that enables you to measure the time it takes for a small object to fall from rest through a distance of 2.00 m. Your measurement is 8.0 s.
(a) Calculate the acceleration due to gravity ga at the surface of the rock.
ga is constant for the drop in the experiment
The Attempt at a Solution
well i cant work out the acceleration as i dont know the velocity.
Need help on this...