Physics of Everyday Phenomena
9th Edition
ISBN: 9781260048469
Author: Griffith
Publisher: MCG
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Chapter 3, Problem 8CQ
A rock is dropped from the top of a diving platform into the swimming pool below. Will the distance traveled by the rock in a 0.1-second interval near the top of its flight be the same as the distance covered in a 0.1-second interval just before it hits the water? Explain.
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I just wanted to make sure I did this right
a) What is the car’s average speed, in km/h, from Hither to Yon for the first part of the trip?
G: △d=450Km △T=4.50hr
U: v
E v=△d△t
S v=450km4.50hr
S the average speed from Hither to Yon is 100km/h
b)How long, in hours, did it take for the car to return to Hither from Yon?
G: △d=90.0km/h V=100km/h
U: △t
E △t=△dV
S △t=90.0km100km/h
S It took 9.0hr to get back to Hither from Yon
c) What is the average velocity of the car for the entire (whole) journey, from Hither to Yon, and back to Hither?
G △d =450km + 450km = 900km △T=4.50hr+4.50hr=9.0hr
U: V
E v=△d△t
S v=900km9.0hr
S the average velocity for the entire journey is 100km/hr
6. A ball is thrown upward with a velocity of 4.5 m/s. Its speed and the magnitude of its
acceleration at the highest point
(a) are both equal to zero
(b) are given by 9.81 m/s and 0 m/s², respectively
(c) are given by 0 m/s and 9.81 m/s², respectively
(d) cannot be predicted unless the height is known
Answer:
7. Which of the following statements about a projectile is not true? Assume that the air resistance
is negligible.
(a) Its motion is in two dimensions.
(b) The only acceleration is in the vertical direction.
(c) Its velocity in the horizontal direction remains the same throughout the flight.
(d) The velocity at the highest point of its trajectory is zero.
Answer:
Q9. i) A ball is thrown vertically up with an initial velocity of 28 m/s.
(a) How high will it reach
(b) How much time it will take to reach the highest point
(c) With what velocity it reaches the point from where it was thrown
ii) Evaluate the simplest SI unit of K, if K =
m²x2
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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