m A small rock is thrown vertically upward with a speed of 12.0 from the edge of the roof of a S 25.0 m tall building. The rock doesn't hit the building on its way back down and lands on the street below. Ignore air resistance. What is the speed of the rock just before it hits the street? How much time elapses from when the rock is thrown until it hits the street? Find the maximum height above the ground that the rock reaches.

Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter2: Motion In One Dimension
Section: Chapter Questions
Problem 43P: A ball starts from rest and accelerates at 0.500 m/s2 while moving down an inclined plane 9.00 m...
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5. A small rock is thrown vertically upward with a speed of 12.0 from the edge of the roof of a
25.0 m tall building. The rock doesn't hit the building on its way back down and lands on the
street below. Ignore air resistance.
a. What is the speed of the rock just before it hits the street?
b.
How much time elapses from when the rock is thrown until it hits the street?
c. Find the maximum height above the ground that the rock reaches.
d. At what time after being released has the rock fallen 8.0 m below the roof edge?
e. What is the ball's acceleration when it is 8.0 m below the roof edge?
vy=25.18 m/s
a.
b. t = 3.79 s
c. y 32.35 m
d. t = 2.99 s
e. ay = -9.8 m/s²
Transcribed Image Text:5. A small rock is thrown vertically upward with a speed of 12.0 from the edge of the roof of a 25.0 m tall building. The rock doesn't hit the building on its way back down and lands on the street below. Ignore air resistance. a. What is the speed of the rock just before it hits the street? b. How much time elapses from when the rock is thrown until it hits the street? c. Find the maximum height above the ground that the rock reaches. d. At what time after being released has the rock fallen 8.0 m below the roof edge? e. What is the ball's acceleration when it is 8.0 m below the roof edge? vy=25.18 m/s a. b. t = 3.79 s c. y 32.35 m d. t = 2.99 s e. ay = -9.8 m/s²
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