Essential University Physics: Volume 1 (3rd Edition)
3rd Edition
ISBN: 9780321993724
Author: Richard Wolfson
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 4.6, Problem 4.6GI
(1) Would the answer to (a) in Example 4.5 change if the helicopter were not at rest but moving upward at constant speed? (2) Would the answer to (b) change if the helicopter were moving downward but still accelerating upward?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
In What If? section of Example 4.5, it was claimed that the maximum range of a ski jumper occurs for a launch angle given by
where is the angle the hill makes with the horizontal in Figure 4.15? Prove this claim by deriving the equation above.
Answer detailly 6
i followed examples in the textbook but i still am deducing the wrong answer :( but somehow i’m getting the right direction value
Chapter 4 Solutions
Essential University Physics: Volume 1 (3rd Edition)
Ch. 4.2 - A curved barrier lies on a horizontal tabletop, as...Ch. 4.2 - A nonzero net force acts on an object. Which of...Ch. 4.4 - A popular childrens book explains the...Ch. 4.5 - For each of the following situations, would the...Ch. 4.6 - The figure shows two blocks with two forces acting...Ch. 4.6 - (1) Would the answer to (a) in Example 4.5 change...Ch. 4 - Distinguish the Aristotelian and Galilean/New...Ch. 4 - A ball bounces off a wall with the same speed it...Ch. 4 - We often use the term inertia to describe human...Ch. 4 - Does a body necessarily move in the direction of...
Ch. 4 - A truck crashes into a stalled car. A student...Ch. 4 - A barefoot astronaut kicks a ball, hard, across a...Ch. 4 - The surface gravity on Jupiters moon Io is...Ch. 4 - In paddling a canoe, you push water backward with...Ch. 4 - Is it possible for a nonzero net force to act on...Ch. 4 - As your plane accelerates down the runway, you...Ch. 4 - A driver tells passengers to buckle their...Ch. 4 - If you cut a spring in half, is the spring...Ch. 4 - As youre sitting on a chair, theres a...Ch. 4 - Section 4.2 Newtons First and Second Laws A subway...Ch. 4 - A 61-Mg railroad locomotive can exert a 0.12-MN...Ch. 4 - A small plane accelerates down the runway at 7.2...Ch. 4 - A car leaves the road traveling at 110 km/h and...Ch. 4 - By how much does the force required to stop a car...Ch. 4 - Kinesin is a motor protein responsible for moving...Ch. 4 - Starting from rest and undergoing constant...Ch. 4 - In an egg-dropping contest, a student encases an...Ch. 4 - In a front-end collision, a 1300-kg car with...Ch. 4 - Show that the units of acceleration can be written...Ch. 4 - Your spaceship crashes on one of the Suns planets....Ch. 4 - Your friend can barely lift a 35-kg concrete block...Ch. 4 - A cereal box says net weight 340 grams. Whats the...Ch. 4 - Youre a safely engineer for a bridge spanning the...Ch. 4 - The gravitational acceleration at the...Ch. 4 - A 50-kg parachutist descends at a steady 40 km/h....Ch. 4 - A 930-kg motorboat accelerates away from a dock at...Ch. 4 - An elevator accelerates downward at 2.4 m/s2. What...Ch. 4 - At 560 metric tons, the Airbus A-380 is the worlds...Ch. 4 - Youre an engineer working on Ares I, NASAs...Ch. 4 - You slop into an elevator, and it accelerates to a...Ch. 4 - What upward gravitational force does a 5600-kg...Ch. 4 - Your friends mass is 65 kg. If she jumps off a...Ch. 4 - What force is necessary to stretch a spring 48 cm,...Ch. 4 - A 35-N force is applied to a spring with spring...Ch. 4 - A spring with spring constant k = 340 N/m is used...Ch. 4 - A 1.25-kg object is moving in the x-direction at...Ch. 4 - An airplane encounters sudden turbulence, and you...Ch. 4 - A 74-kg tree surgeon rides a cherry picker lift to...Ch. 4 - A dancer executes a vertical jump during which the...Ch. 4 - Find expressions for the force needed to bring an...Ch. 4 - An elevator moves upward at 5.2 m/s. Whats its...Ch. 4 - A 2.50-kg object is moving along the x-axis at...Ch. 4 - Blocks of 1.0, 2.0, and 3.0 kg are lined up on a...Ch. 4 - A child pulls an 11-kg wagon with a horizontal...Ch. 4 - Biophysicists use an arrangement of laser beams...Ch. 4 - A force F is applied to a spring of spring...Ch. 4 - A 22(M)-kg airplane pulls two gliders, the first...Ch. 4 - A biologist is studying the growth of rats on the...Ch. 4 - An elastic towrope has spring constant 1300 N/m....Ch. 4 - A 2.0-kg mass and a 3.0-kg mass are on a...Ch. 4 - Youre an automotive engineer designing the crumple...Ch. 4 - Frogs tongues dart out to catch insects, with...Ch. 4 - Two large crates, with masses 640 kg and 490 kg,...Ch. 4 - What force do the blades of a 4300-kg helicopter...Ch. 4 - What engine thrust (force) is needed to accelerate...Ch. 4 - Your engineering firm is asked to specify the...Ch. 4 - With its fuel tanks half full, an F-35A jet...Ch. 4 - Two springs have the same unstretched length but...Ch. 4 - Although we usually write Newtons second law for...Ch. 4 - A railroad car is being pulled beneath a grain...Ch. 4 - A block 20% more massive than you hangs from a...Ch. 4 - Youre asked to calibrate a device used to measure...Ch. 4 - A spider of mass ms drapes a silk thread of...Ch. 4 - Figure 4.27 shows vertical accelerometer data from...Ch. 4 - A hockey stick is in contact with a 165-g puck for...Ch. 4 - After parachuting through the Martian atmosphere,...Ch. 4 - Your airplane is caught in a brief, violent...Ch. 4 - Youre assessing the Engineered Material Arresting...Ch. 4 - Two masses are joined by a massless string. A 30-N...Ch. 4 - A mass M hangs from a uniform rope of length L and...Ch. 4 - Jerk is the rate of change of acceleration, and...Ch. 4 - Laptop computers are equipped with accelerometers...Ch. 4 - Laptop computers are equipped with accelerometers...Ch. 4 - Laptop computers are equipped with accelerometers...Ch. 4 - Laptop computers are equipped with accelerometers...
Additional Science Textbook Solutions
Find more solutions based on key concepts
Which color of light has the greatest energy output in Figure 1?
Figure 1
Lecture- Tutorials for Introductory Astronomy
How do the orbits of known extrasolar planets differ from those of planets in our solar system? What leads us t...
Life in the Universe (4th Edition)
25.42 The battery for a certain cell phone is rated at 3.70 V. According to the manufacturer it can produce 3.1...
University Physics (14th Edition)
Which takes more heat: melting a gram of ice already at 0C, or bringing the melted water to the boiling point?
Essential University Physics (3rd Edition)
2. You push a child on a swing. Why doesn’t the child continue in a vertical loop over the top of the swing?
a....
College Physics
A 4800-kg open railroad car coasts along with a constant speed of 8.60 m/s on a level track. Snow begins to fal...
Physics for Scientists and Engineers with Modern Physics
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- A) A student throws a dart horizontally toward the center of a target, X, at a speed of 20 m/s as shown. The dart flies for 0.1 s and then hits below the center, at Y. How much lower, in m, does it hit? B) A drone at too great a height drops a box. The box drops straight down the ground and hits at 100 m/s smashing the contents. Neglecting air friction, approximately, how high, in m was the drone? C) is in the picturearrow_forwardIn a downhill ski race, your final velocity is not affected very much by getting a running start, because the initial kinetic energy is small compared with the gain in gravitational potential energy on even small hills. However, you will finish the race much faster (which is more important!). To demonstrate this, find the final speed and the time taken for a skier who skies 77.5 m along a slope that is 29°, measured from horizontal, in the following situations (you may neglect friction).arrow_forwardThe banded archerfish is a species of fish that lives in mangrove estuaries in Asia and Oceania. It has a unique and highly effective hunting strategy: it shoots an incredibly precise stream of water out of its mouth at almost ten meters per second, knocking insects and other small animals into the water from nearby branches! Pom Fbug (t) Ө = Our hero, a hungry archerfish, has spotted a big, delicious bug sitting on a branch a height ħ above the surface of the water. The archerfish can shoot its water jet at a speed of vo. The archerfish wants to knock the bug sideways off of the branch, so it decides to shoot so that its water jet is moving horizontally at the moment when it strikes the bug. The final goal of this problem is to find the horizontal distance, d, from the branch, and the angle above horizontal, 0, at which archerfish should shoot. d (a) What are the position and velocity of the water droplet as a function of time and the position and velocity of the bug as a function of…arrow_forward
- In a downhill ski race, your final velocity is not affected very much by getting a running start, because the initial kinetic energy is small compared with the gain in gravitational potential energy on even small hills. However, you will finish the race much faster (which is more important!). To demonstrate this, find the final speed and the time taken for a skier who skies 82.5 m along a slope that is 29°, measured from horizontal, in the following situations (you may neglect friction). a) Find the final speed (in m/s) of the skier starting from rest. b) How long (in s) does it take for the skier to reach the bottom of this hill starting from rest? c) Find the final speed (in m/s) of the skier starting with a speed of 2.50 m/s. d)How long (in s) does it take for the skier to reach the bottom of this hill with a starting speed of 2.50 m/s?arrow_forwardA body of mass m Starts down from rest from the top of an inclined plane 20 ft long and 10 ft high. What is its velocity at a point 12 ft from the top?arrow_forwardIn a downhill ski race, your final velocity is not affected very much by getting a running start, because the initial kinetic energy is small compared with the gain in gravitational potential energy on even small hills. However, you will finish the race much faster (which is more important!). To demonstrate this, find the final speed and the time taken for a skier who skies 62.5 m along a slope that is 22°, measured from horizontal, in the following situations (you may neglect friction). A.)How long in (s) does it take for the skier to reach the bottom of this hill starting from rest?arrow_forward
- In the absence of air resistance, if a ball is thrown vertically upward with a certain initial speed, on returning to its original level it will have the same speed. When air resistance is a factor, will the ball be moving faster, the same, or more slowly than its throwing speed when it gets back to the same level? Why? (Physicists often use a “principle of exaggeration” to help them analyze a problem. Consider the exaggerated case of a feather, not a ball, because the effect of air resistance on the feather is more pronounced and therefore easier to visualize.)arrow_forwardA baseball pitcher throws a pitch horizontally from a height of 6 feet with an initial speed of 130 feet per second. (a) Find a vector-valued function describing the position of the ball t seconds after release. (b) If home plate is 60 feet away, how high is the ball when it crosses home plate? (c) If a person drops a ball from height 6 feet at the same time the pitcher releases the ball, how high will the dropped ball be when the pitch crosses home plate?arrow_forwardHello, can you help me for this physics problem? I will have TE after the holidays, I need your help, many many thanks! A cyclist rides at constant speed on a loop circuit. From (1) to (2), the path is horizontal and it has the shape of a semicircle of radius R = 1250m. From (2) to (3), it is about a regular rise whose angle with the horizontal is 10. From (3) to (1), it is about a descent identical to the rise. The cyclist has a mass of 65kg, he moves at a constant speed of 18 km / h (form coefficient C = 0.8 and wind-catching surface S = 0.6 m ^ 2) (a)Determine the work done by each force . (b) We are looking for the power produced by the cyclist on the path between (1) and (2), then between (2) and (3). Between (3) and (1), the cyclist applies the brakes, this will be a dissipated braking power.arrow_forward
- In a downhill ski race, your final velocity is not affected very much by getting a running start, because the initial kinetic energy is small compared with the gain in gravitational potential energy on even small hills. However, you will finish the race much faster (which is more important!). To demonstrate this, find the final speed and the time taken for a skier who skies 65 m along a slope that is 17°, measured from horizontal, in the following situations (you may neglect friction). A: Find the final speed (in m/s) of the skier starting from rest. B: How long (in s) does it take for the skier to reach the bottom of this hill starting from rest? C:Find the final speed (in m/s) of the skier starting with a speed of 2.50 m/s. D: How long (in s) does it take for the skier to reach the bottom of this hill with a starting speed of 2.50 m/s?arrow_forwardA package of mass 5 kg is released from a channel as shown in the figure, slides down. Package, AB to the curved part (0 = 0°) 8 m/s is moving rapidly. your channel the package assuming it is smooth, (a) its velocity when it reaches the C point (0 = 30°), and (b) when it reaches the horizontal plane (b) (@=45°, B noktası) nset the speed. (c) The normal force acting on the package at C calculate. 450 B 8=30° 20 m C 8 m/s A 45°arrow_forwardSometime in the future, we will develop a space ship which can go up to half the speed of light. On a flight to the nearest star which is 4.2 light years away, we will keep the acceleration up to one g. How long will the trip take? (The trip will have three sections, the first accelerating up to maximum speed, the second at constant speed, and the third decelerating at - g to rest at the destination.)arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningGlencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-Hill
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Glencoe Physics: Principles and Problems, Student...
Physics
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Glencoe/McGraw-Hill
Kinematics Part 3: Projectile Motion; Author: Professor Dave explains;https://www.youtube.com/watch?v=aY8z2qO44WA;License: Standard YouTube License, CC-BY