Use the average acceleration obtained in Activity 1 to determine how far the ball should drop at 0.3 second, 0.5 second, and 0.7 second. Using the simplified formula y = at2 (because y0 = 0 and v0 = 0), calculate y to one decimal place.

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

im srry but ur wrong the answer is d a smooth rock, some red dirt, and an empty bird's nest.