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While riding on an elevator descending with a constant speed of 3.0 m/s, you accidentally drop a book from under your arm.

How long does it take for the book to reach the elevator floor, 1.2 m below your arm?

What is the book’s speed when it hits the elevator floor?

My question is why is 3.0 m/s in constant speed ignored in this question?

We are using the equation x = x

Why is that v

Since velocity here is descending then the velocity in this question is -3.0 m/s correct?

also i am having problem solving part b in which i dont know where to begin

How long does it take for the book to reach the elevator floor, 1.2 m below your arm?

What is the book’s speed when it hits the elevator floor?

My question is why is 3.0 m/s in constant speed ignored in this question?

We are using the equation x = x

_{0}+ v_{0}+ 1/2(a)(t^{2})Why is that v

_{0}is not plugged in? When 3.0 m/s is v_{0}(velocity).Since velocity here is descending then the velocity in this question is -3.0 m/s correct?

also i am having problem solving part b in which i dont know where to begin

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