Arock is thrown downward with velocity 10 ft/sec from a bridge 100 ft above the water. how fast is the rock going when it hits the water?

A rock is thrown downward with velocity 10 ft/sec from a bridge 100 ft above the water. The velocity of the rock upon impact on the water can be solve using the formula:

V= sqroot(2gy) where g is the acceleration due to gravity and y the height

V= sqroot(2 (32.2 ft/s2) (100ft) = 80.25 ft/s

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .

current flows in a wire