Aphysics book is thrown horizontally at a velocity of 5.0 m/s from the top of a cliff 78.4 m high. how long does the book take to reach the bottom of the cliff .

The book's vertical position in the air is

where . It reaches the ground when , at a time such that

So it takes the book 4 seconds to reach the bottom. The given initial velocity is irrelevant since it only has a horizontal component; vertically, the book is starting from rest.

answer; how far out of place which the object finished relative to the starting location;

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.