Physics (5th Edition)
5th Edition
ISBN: 9780321976444
Author: James S. Walker
Publisher: PEARSON
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Textbook Question
Chapter 4, Problem 9CQ
A child rides on a pony walking with constant velocity. The boy leans over to one side and a scoop of ice cream falls from his ice cream cone. Describe the path of the scoop of ice cream as seen by (a) the child and (b) his parents standing on the ground nearby.
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A camera operator is filming a nature explorer in the Rocky Mountains. The explorer needs to swim across a river to his campsite. By watching debris flowing down the river, the operator estimates that the stream is flowing at 0.625 m/s0.625 m/s . In still water, the explorer can swim at 0.735 m/s0.735 m/s . At what angle, less than 90°, with respect to the shoreline should the operator advise him to swim so that he travels directly across the stream to his campfire
The water is near freezing in temperature. Typically a human can only swim in such water for about 300 s300 s (or 5 min5 min ) before hypothermia sets in. Calculate the time the explorer spends in the water if the river is 27.9 m27.9 m wide.
A camera operator is filming a nature explorer in the Rocky Mountains. The explorer needs to swim across a river to his
campsite. By watching debris flowing down the river, the operator estimates that the stream is flowing at 0.633 m/s. In still
water, the explorer can swim at 0.759 m/s. At what angle, less than 90°, with respect to the shoreline should the operator
advise him to swim so that he travels directly across the stream to his campfire?
angle: 33.389
The water is near freezing in temperature. Typically a human can only swim in such water for about 300 s (or 5 min) before
hypothermia sets in. Calculate the time the explorer spends in the water if the river is 28.3 m wide.
time in the water:
81.03
S
Incorrect
Based on the results, what should the camera operator's decision be about the explorer's swim?
Approved. He will get cold but he should be able to make it across.
Sorry, but the swim must be cancelled. He will never make it across in time.
A peregrine falcon is the fastest bird, flying at a speed of 200 mi/h. Nature has adapted the bird to reach such a speed by placing baffles in its nose to prevent air from rushing in and slowing it down. Also, the bird's eyes adjust their focus faster than the eyes of any other creature, so the falcon can focus quickly on its prey. Assume that a peregrine falcon is moving horizontally at its top speed at a height of 100m above the ground when it brings its wings into its sides and begins to drop in free fall. How far will the bird fall vertically while traveling horizontally at a distance of 100m?
Chapter 4 Solutions
Physics (5th Edition)
Ch. 4.1 - The equations of motion of an object are x = (1...Ch. 4.2 - A sailor drops a pair of binoculars from the crows...Ch. 4.3 - Two objects, A and B, are launched horizontally,...Ch. 4.4 - A projectile is launched and lands at the same...Ch. 4.5 - A baseball player throws a ball to another player...Ch. 4 - What is the acceleration of a projectile when it...Ch. 4 - A projectile is launched with an initial speed of...Ch. 4 - A projectile is launched from level ground. When...Ch. 4 - In a game of baseball a player hits a high fly...Ch. 4 - A projectile is launched with an initial velocity...
Ch. 4 - A projectile is launched from a level surface with...Ch. 4 - Do projectiles for which air resistance is...Ch. 4 - Two projectiles are launched from the same point...Ch. 4 - A child rides on a pony walking with constant...Ch. 4 - Driving down the highway, you find yourself behind...Ch. 4 - A projectile is launched from the origin of a...Ch. 4 - Predict/Explain As you walk briskly down the...Ch. 4 - A sailboat runs before the wind with a constant...Ch. 4 - As you walk to class with a constant speed of 1.75...Ch. 4 - Starting from rest, a car accelerates at 2.0 m/s2...Ch. 4 - Predict/Calculate A particle passes through the...Ch. 4 - A skateboarder travels on a horizontal surface...Ch. 4 - A hot-air balloon is drifting in level flight due...Ch. 4 - An electron in a cathode-ray tube is traveling...Ch. 4 - Two canoeists start paddling at the same time and...Ch. 4 - Predict/Explain Two divers run horizontally off...Ch. 4 - Predict/Explain Two youngsters dive off an...Ch. 4 - An archer shoots an arrow horizontally at a target...Ch. 4 - Victoria Falls The great, gray-green, greasy...Ch. 4 - A diver runs horizontally off the end of a diving...Ch. 4 - An astronaut on the planet Zircon tosses a rock...Ch. 4 - Predict/Calculate Pitchers Mounds Pitchers mounds...Ch. 4 - Playing shortstop, you pick up a ground ball and...Ch. 4 - Predict/Calculate A crow is flying horizontally...Ch. 4 - A mountain climber jumps a 2.8-m-wide crevasse by...Ch. 4 - Predict/Calculate A white-crowned sparrow flying...Ch. 4 - Pumpkin Toss In Denver, children bring their old...Ch. 4 - Fairgoers ride a Ferris wheel with a radius of...Ch. 4 - Predict/Calculate A swimmer runs horizontally off...Ch. 4 - Baseball and the Washington Monument On August 25,...Ch. 4 - A basketball is thrown horizontally with an...Ch. 4 - Predict/Calculate A ball rolls off a table and...Ch. 4 - A certain projectile is launched with an initial...Ch. 4 - Three projectiles (A, B, and C) are launched with...Ch. 4 - Three projectiles (A, B, and C) are launched with...Ch. 4 - A cannonball is launched at an angle above level...Ch. 4 - A second baseman tosses the ball to the first...Ch. 4 - A soccer ball is kicked with a speed of 15.6 m/s...Ch. 4 - In a game of basketball a forward makes a bounce...Ch. 4 - Predict/Calculate Snowballs are thrown with a...Ch. 4 - In Problem 34, find the direction of motion of the...Ch. 4 - A golfer gives a ball a maximum initial speed of...Ch. 4 - What is the highest tree the ball in the previous...Ch. 4 - The hang time of a punt is measured to be 4.50 s....Ch. 4 - In a friendly game of handball, you hit the ball...Ch. 4 - On a hot summer day a young girl swings on a rope...Ch. 4 - A certain projectile is launched with an initial...Ch. 4 - Punkin Chunkin In Dover, Delaware, a...Ch. 4 - A dolphin jumps with an initial velocity of 12.0...Ch. 4 - A player passes a basketball to another player who...Ch. 4 - A golf ball is struck with a five iron on level...Ch. 4 - Predict/Explain You throw a ball into the air with...Ch. 4 - A football quarterback shows off his skill by...Ch. 4 - A clever inventor has created a device that can...Ch. 4 - Predict/Calculate Volcanoes on lo Astronomers have...Ch. 4 - Predict/Calculate A soccer ball is kicked with an...Ch. 4 - A soccer ball is kicked with an initial speed of...Ch. 4 - An archer shoots an arrow over a castle wall by...Ch. 4 - CE Child 1 throws a snowball horizontally from the...Ch. 4 - CE The penguin to the left in the accompanying...Ch. 4 - CE Dolphins may leap from the water just for the...Ch. 4 - CE Predict/Explain A person flips a coin into the...Ch. 4 - CE Predict/Explain Suppose the elevator in the...Ch. 4 - A train moving with constant velocity travels 170...Ch. 4 - A tennis ball is struck in such a way that it...Ch. 4 - A person tosses a ball for her puppy to retrieve....Ch. 4 - An osprey flies horizontally with a constant speed...Ch. 4 - Predict/Calculate A hot-air balloon rises from the...Ch. 4 - In a friendly neighborhood squirt gun contest a...Ch. 4 - BIO Spitting Llamas An agitated llama may spit to...Ch. 4 - A particle leaves the origin with an initial...Ch. 4 - BIO When the dried-up seed pod of a scotch broom...Ch. 4 - Trick Shot In an Internet video an athlete...Ch. 4 - A shot-putter throws the shot with an initial...Ch. 4 - Two marbles are launched at t = 0 in the...Ch. 4 - Rescue Swimmers Coast Guard rescue swimmers are...Ch. 4 - A football player kicks a field goal, launching...Ch. 4 - A ball thrown straight upward returns to its...Ch. 4 - Predict/Calculate To decide who pays for lunch, a...Ch. 4 - Predict/Calculate A cannon is placed at the bottom...Ch. 4 - A golfer hits a shot to an elevated green. 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