Fundamentals of Physics
10th Edition
ISBN: 9781118230732
Author: David Halliday
Publisher: WILEY
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Textbook Question
Chapter 2, Problem 102P
The sport with the fastest moving ball is jai alai, where measured speeds have reached 303 km/h. If a professional jai alai player faces a ball at that speed and involuntarily blinks, he blacks out the scene for 100 ms. How far does the ball move during the blackout?
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Case 2: While the one friend is timing the flight of the ball, you have another friend measuring the maximum height of the ball. Before the throw, you all made height marks up a wall. You are going to throw standing in front of this wall so your friend can stand at a distance and see how high up the wall the ball travels. Your friend sees the ball reach the 21.5 meter mark. Using the maximum height of the ball instead of the time of flight, what initial velocity did you give to the ball? Using the velocity 26 m/s, what maximum height would you expect your friend to measure? Using the velocity you calculated for case 2, how long do you expect it to take for the ball to hit the ground?
Bob has just finished climbing a sheer cliff above a level
beach and wants to figure out how high he climbed. All he
has to use is a baseball, a stopwatch, and a friend on the
ground below with a long measuring tape.
Bob is a pitcher, and knows that the fastest he can throw the
ball is about vo = 32.1 m/s. Bob starts the stopwatch as he
throws the ball, with no way to measure the ball's initial
trajectory, and watches carefully. The ball rises and then falls,
and after ti = 0.710 s the ball is once again level with Bob.
Bob cannot see well enough to time when the ball hits the
ground. Bob's friend then measures that the ball hit the
ground x = 129 m from the base of the cliff.
How high h above the beach was the ball when it
was thrown?
h =
No 1.
x10
TOOLS
X
Bob has just finished climbing a sheer cliff above a level
beach and wants to figure out how high he climbed. All he
has to use is a baseball, a stopwatch, and a friend on the
ground below with a long measuring tape.
Bob is a pitcher, and knows that the fastest he can throw the
ball is about vo = 32.1 m/s. Bob starts the stopwatch as he
throws the ball, with no way to measure the ball's initial
trajectory, and watches carefully. The ball rises and then falls,
and after t₁ = 0.710 s the ball is once again level with Bob.
Bob cannot see well enough to time when the ball hits the
ground. Bob's friend then measures that the ball hit the
ground x = 129 m from the base of the cliff.
How high h above the beach was the ball when it
was thrown?
Chapter 2 Solutions
Fundamentals of Physics
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The position...Ch. 2 - In an arcade video game, a spot is programmed to...Ch. 2 - A rock is shot vertically upward from the edge of...Ch. 2 - GO At the instant the traffic light turns green,...Ch. 2 - A pilot flies horizontally at 1300 km/h, at height...Ch. 2 - GO To stop a car, first you require a certain...Ch. 2 - GO Figure 2-42 shows part of a street where...Ch. 2 - SSM A hot rod can accelerate from 0 to 60 km/h in...Ch. 2 - GO A red train traveling at 72 km/h and a green...Ch. 2 - GO At time t = 0, a rock climber accidentally...Ch. 2 - A train started from rest and moved with constant...Ch. 2 - SSM A particles acceleration along an x axis is a...Ch. 2 - Figure 2-44 gives the acceleration a versus time t...Ch. 2 - Figure 2-45 shows a simple device for measuring...Ch. 2 - A rocket-driven sled running on a straight, level...Ch. 2 - A mining cart is pulled up a hill at 20 km/h and...Ch. 2 - A motorcyclist who is moving along an x axis...Ch. 2 - SSM When the legal speed limit for the New York...Ch. 2 - A car moving with constant acceleration covered...Ch. 2 - SSM A certain juggler usually tosses balls...Ch. 2 - A particle starts from the origin at t = 0 and...Ch. 2 - A rock is dropped from a 100-m-high cliff. 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