Question

A book is thrown downward from the library window with a speed of 2.0 s m and lands on the ground 5.0 m. We can ignore air resistance. What is the final velocity of the book in m/s?

Answer 1

-10

Step-by-step explanation:

I got that mf right

Answer 2

10.1m/s

Step-by-step explanation:

Using the equation of motion v² = u²+2as where;

v is the final velocity

u is the initial velocity

a is the acceleration due to gravity

s is the height of fall

Given

u = 2.0m/s

s = 5.0m

g = 9.81m/s²

Required

final velocity of the book in m/s

Substitute the given parameters into the formula;

v² = u²+2as

v² = 2²+2(9.81)(5)

v² = 4+98.1

v² = 102.1

v = √102.1

v = 10.1m/s

Hence the final velocity of the book in m/s is 10.1m/s