Physics of Everyday Phenomena
9th Edition
ISBN: 9781259894008
Author: W. Thomas Griffith, Juliet Brosing Professor
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 3, Problem 4E
Suppose Galileo’s pulse rate was 75 beats per minute.
- a. How many beats per second is this?
- b. What is the time in seconds between consecutive pulse beats?
- c. How far (in meters) does an object fall in this time when dropped from rest?
- d. What is this distance in feet (use the conversion factors on the inside front cover)?
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2. The position of a drone as a function of time is given by
*(t) = ( 8 i + 1.5 k) + (-3 î + 2 j) t – 0.5 t2 j
The units are missing in the constant coefficients above, i.e., "0.5" should be "0.5 m/s2". Include the correct units
on all the constant coefficients in your answers below.
a.
What is the x-position of the drone as a function of time?
b.
What is the y-position of the drone as a function of time?
c. How far away is the drone from its starting position at t = 3s?
d.
What is the acceleration vector?
е.
What is the velocity vector as a function of time? (One way to do this is to take the time derivative of the
position vector.)
f. Make a sketch of the x, y, and z positions of the drone as function of time. You just need the general shape.
time
time
time
6. A train is moving with a constant speed. The train moves 60 meters for every 1.5 seconds that
elapses.
a. Assume that we get 40 by dividing 60 by 1.5. What is the name that is commonly given
to a quantity represented by this number 40?
b. To denote the quantity completely, what additional information must be given besides the
number 40?
c. How would you interpret the number 40 in this instance? Your answer should mention
distance and time.
d. Use your interpretation (not algebra) to find the distance the train moves in 2.5 seconds.
A ball is thrown from the top of a building and falls to the ground below. Its path is determine by the equation h=-4t square + 36t + 40, where h is the height above the ground in meters and t is the elapsed time in seconds. Determine:
a. The maximum height the ball reaches and the time it takes to reach maximum height by using the method of completing the square. Keep in fraction form. b. Determine when the ball hits the ground. c. What is the height of the building.
Chapter 3 Solutions
Physics of Everyday Phenomena
Ch. 3 - A small piece of paper is dropped and flutters to...Ch. 3 - The diagram shows the positions at intervals of...Ch. 3 - The diagram shows the positions at intervals of...Ch. 3 - A lead ball and an aluminum ball, each 1 in. in...Ch. 3 - Two identical pieces of paper, one crumpled into a...Ch. 3 - Two identical pieces of paper, one crumpled into a...Ch. 3 - Aristotle stated that heavier objects fall faster...Ch. 3 - A rock is dropped from the top of a diving...Ch. 3 - The graph shows the velocity plotted against time...Ch. 3 - Prob. 10CQ
Ch. 3 - Prob. 11CQCh. 3 - A ball is thrown downward with a large starting...Ch. 3 - A ball thrown straight upward moves initially with...Ch. 3 - A rock is thrown straight upward, reaching a...Ch. 3 - A ball is thrown straight upward and then returns...Ch. 3 - A ball is thrown straight upward and then returns...Ch. 3 - A ball is thrown straight upward. At the very top...Ch. 3 - A ball is thrown straight upward and then returns...Ch. 3 - Prob. 19CQCh. 3 - A ball rolling rapidly along a tabletop rolls off...Ch. 3 - For the two balls in question 20, which, if...Ch. 3 - Is it possible for an object to have a horizontal...Ch. 3 - A ball rolls off a table with a large horizontal...Ch. 3 - A ball rolls off a table with a horizontal...Ch. 3 - An expert marksman aims a high-speed rifle...Ch. 3 - In the diagram, two different trajectories are...Ch. 3 - For either of the trajectories shown in the...Ch. 3 - Assuming that the two trajectories in the diagram...Ch. 3 - A cannonball fired at an angle of 70 to the...Ch. 3 - Will a shot fired from a cannon at a 20 launch...Ch. 3 - The diagram shows a wastebasket placed behind a...Ch. 3 - In the situation pictured in question 31, is the...Ch. 3 - In shooting a free throw in basketball, what is...Ch. 3 - In shooting a basketball from greater than...Ch. 3 - A football quarterback must hit a moving target...Ch. 3 - A steel ball is dropped from a diving platform...Ch. 3 - For the ball in exercise E1: a. Through what...Ch. 3 - A large rock is dropped from the top of a high...Ch. 3 - Suppose Galileos pulse rate was 75 beats per...Ch. 3 - A ball is thrown downward with an initial velocity...Ch. 3 - A ball is dropped from a high building. Using the...Ch. 3 - A ball is thrown upward with an initial velocity...Ch. 3 - How high above the ground is the ball in exercise...Ch. 3 - At what time does the ball in exercise 7 reach the...Ch. 3 - Prob. 10ECh. 3 - A bullet is fired horizontally with an initial...Ch. 3 - A ball rolls off a shelf with a horizontal...Ch. 3 - A ball rolls off a table with a horizontal...Ch. 3 - A ball rolls off a table with a horizontal...Ch. 3 - A ball rolls off a platform that is 3 meters above...Ch. 3 - A projectile is fired at an angle such that the...Ch. 3 - A ball is thrown straight upward with an initial...Ch. 3 - Two balls are released simultaneously from the top...Ch. 3 - Two balls are rolled off a tabletop that is 0.7 m...Ch. 3 - A cannon is fired over level ground at an angle of...Ch. 3 - An excellent major league pitcher can throw a...Ch. 3 - An archeologist is running at 8 m/s with her hands...
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