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Physics / Sears and Zemansky's University Physics with Modern Physics 13 / Chapter 2 / Problem 42E

Sears and Zemansky's University Physics with Modern Physics | 13th Edition | ISBN: 9780321696861 | Authors: Hugh D. Young; Roger A. Freedman; A. Lewis Ford

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Answer: A brick is dropped (zero initial speed) from the

Chapter 2, Problem 42E

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QUESTION:

A brick is dropped (zero initial speed) from the roof of a building. The brick strikes the ground in 2.50 s. You may ignore air resistance, so the brick is in free fall.

(a) How tall, in meters, is the building?

(b) What is the magnitude of the brick’s velocity just before it reaches the ground?

(c) Sketch ay−t, vy−t, and y−t graphs for the motion of the brick.

Questions & Answers

QUESTION:

A brick is dropped (zero initial speed) from the roof of a building. The brick strikes the ground in 2.50 s. You may ignore air resistance, so the brick is in free fall.

(a) How tall, in meters, is the building?

(b) What is the magnitude of the brick’s velocity just before it reaches the ground?

(c) Sketch ay−t, vy−t, and y−t graphs for the motion of the brick.

ANSWER:

Step 1 of 3

(a) How tall the building in meter is given by

When g is acceleration due to gravity.

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