Physics (5th Edition)
5th Edition
ISBN: 9780321976444
Author: James S. Walker
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 5, Problem 15CQ
Suppose you jump from the cliffs of Acapulco and perform a perfect swan dive. As you fall, you exert an upward force on the Earth equal in magnitude to the downward force the Earth exerts on you. Why, then, does it seem that you are the one doing all the accelerating? Since the forces are the same, why aren’t the accelerations?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
You throw a baseball straight upward with speed v0. When the ball returns to the point from where you threw it, how does its speed compare to v0 (a) in the absence of air resistance and (b) in the presence of air resistance? Explain.
I have a question for elevator problems: Newton's law states that there is always an equal and opposite force. But for elevator problems, if it accelerates upwards... we say that the normal force is greater than the gravitational force. So is Newton's third law still applied here and if so how? Because technically the opposite force is not equal in magnitude for it to be able to accelerate
How do you find the normal force
between a table with a mass of 35 kg and
the floor?
(Assume that normal force and gravity are
the only two vertical forces.)
Your answer:
The normal force is the same
number - 35 kg.
Multiply the mass by the coefficient
of friction.
Multiple the mass by gravitational
acceleration (g = 9.8 m/s²)
The normal force is zero because
the table isn't moving vertically.
The normal force is 9.8 N because it
is on Earth.
Clear answer
Chapter 5 Solutions
Physics (5th Edition)
Ch. 5.1 - Two forces have magnitudes F1 and F2. If these...Ch. 5.2 - Which of the following statements is correct? A: A...Ch. 5.3 - The acceleration of an object has a magnitude a....Ch. 5.4 - A force F pushes on three boxes that slide without...Ch. 5.5 - An object is acted on by a single force that is at...Ch. 5.6 - When a certain person steps onto a scale on solid...Ch. 5.7 - Figure 5-23 shows four identical bricks that are...Ch. 5 - Driving down the road, you hit the brakes...Ch. 5 - Youve probably seen pictures of someone pulling a...Ch. 5 - As you read this, you are most likely sitting...
Ch. 5 - When a dog gets wet, it shakes its body from head...Ch. 5 - A young girl slides down a rope. As she slides...Ch. 5 - A block of mass m hangs from a string attached to...Ch. 5 - An astronaut on a space walk discovers that his...Ch. 5 - Two untethered astronauts on a space walk decide...Ch. 5 - In Figure 5-25 Wilbur asks Mr. Ed, the talking...Ch. 5 - A whole brick has more mass than half a brick,...Ch. 5 - The force exerted by gravity on a whole brick is...Ch. 5 - Is it possible for an object at rest to have only...Ch. 5 - Is it possible for an object to be in motion and...Ch. 5 - A bird cage, with a parrot inside, hangs from a...Ch. 5 - Suppose you jump from the cliffs of Acapulco and...Ch. 5 - A friend tells you that since his car is at rest,...Ch. 5 - Since all objects are weightless in orbit, how is...Ch. 5 - To clean a rug, you can hang it from a clothesline...Ch. 5 - If you step off a high board and drop to the water...Ch. 5 - Is it possible for an object to be moving in one...Ch. 5 - Since a bucket of water is weightless in space,...Ch. 5 - In the movie The Rocketeer, a teenager discovers a...Ch. 5 - List three common objects that have a weight of...Ch. 5 - An object of mass m is initially at rest. After a...Ch. 5 - On a planet far, far away, an astronaut picks up a...Ch. 5 - In a grocery store, you push a 15.4-kg shopping...Ch. 5 - You are pulling your little sister on her sled...Ch. 5 - A 0.53-kg billiard ball initially at rest is given...Ch. 5 - A 92-kg water skier floating in a lake is pulled...Ch. 5 - A 0.5-kg object is acted on by a force whose x...Ch. 5 - Predict/Explain You drop two balls of equal...Ch. 5 - Predict/Calculate A 42.0-kg parachutist is moving...Ch. 5 - Predict/Calculate In baseball, a pitcher can...Ch. 5 - A major-league catcher gloves a 92 mi/h pitch and...Ch. 5 - Driving home from school one day, you spot a ball...Ch. 5 - Stopping a 747 A 747 jetliner lands and begins to...Ch. 5 - The Ux-versus-time graph for a 1.8-kg object is...Ch. 5 - Predict/Calculate A drag racer crosses the finish...Ch. 5 - Predict/Explain A small car collides with a large...Ch. 5 - Predict/Explain A small car collides with a large...Ch. 5 - As you catch a 0.14-kg ball it accelerates at...Ch. 5 - BIO Woodpecker Concussion Prevention A woodpecker...Ch. 5 - On vacation, your 1400-kg car pulls a 560-kg...Ch. 5 - Predict/Calculate An 85-kg parent and a ?4-kg...Ch. 5 - A force of magnitude 7.50 N pushes three boxes...Ch. 5 - A force of magnitude 7.50 N pushes three boxes...Ch. 5 - Predict/Calculate Two boxes sit side-by-side on a...Ch. 5 - A skateboarder on a ramp is accelerated by a...Ch. 5 - Three objects, A, B, and C, have x and y...Ch. 5 - A farm tractor tows a 3300-kg trailer up a 14...Ch. 5 - A shopper pushes a 7 5-kg shopping cart up a 13...Ch. 5 - Two crewmen pull a rail through a lock, as shown...Ch. 5 - A hockey puck is acted on by one or more forces as...Ch. 5 - To give a 19-kg child a ride, two teenagers pull...Ch. 5 - Predict/Calculate A 65-kg skier speeds down a...Ch. 5 - An object acted on by three forces moves with...Ch. 5 - A train is traveling up a 2 88 incline at a speed...Ch. 5 - The Force Exerted on the Moon In Figure 5-37 we...Ch. 5 - You pull upward on a stuffed suitcase with a force...Ch. 5 - BIO Brain Growth A newborn babys brain grows...Ch. 5 - Suppose a rocket launches with an acceleration of...Ch. 5 - During an episode of turbulence in an airplane you...Ch. 5 - At the bow of a ship on a stormy sea, a crewman...Ch. 5 - Predict/Calculate As part of a physics experiment...Ch. 5 - When you weigh yourself on good old terra firma...Ch. 5 - Predict/Calculate BIO Flight of the Samara A...Ch. 5 - When you lift a bowling ball with a force of 82 N,...Ch. 5 - A 23-kg suitcase is pulled with constant speed by...Ch. 5 - (a) Draw a free-body diagram for the skier in...Ch. 5 - A 9.3-kg child sits in a 3.7-kg high chair. (a)...Ch. 5 - Figure 5-39 shows the normal force N experienced...Ch. 5 - Figure 5-40 shows the normal force N as a function...Ch. 5 - A 5.0-kg bag of potatoes sits on the bottom of a...Ch. 5 - Predict/Calculate (a) Find the normal force...Ch. 5 - Predict/Calculate A gardener mows a lawn with an...Ch. 5 - Figure 5-41 Problems 53 53 An ant walks slowly...Ch. 5 - CE Predict/Explain Riding in an elevator moving...Ch. 5 - CE Predict/Explain Riding in an elevator moving...Ch. 5 - CE Give the direction of the net force acting on...Ch. 5 - CE Predict/Explain You jump out of an airplane and...Ch. 5 - In a tennis serve, a 0.070-kg ball can be...Ch. 5 - BIO Human Heart Force The left ventricle of the...Ch. 5 - A 51 5-kg swimmer with an initial speed of 1.25...Ch. 5 - The ax-versus-time graph for a 2.0-kg object is...Ch. 5 - A skateboarder starts from rest and rolls down a...Ch. 5 - The rotors of a 15,200-kg heavy-lift helicopter...Ch. 5 - As it pulls itself up to a branch, a chimpanzee...Ch. 5 - CE Each of the three identical hockey pucks shown...Ch. 5 - Predict/Calculate The VASIMR Rocket NASA plans to...Ch. 5 - An object of mass m = 5.95 kg has an acceleration...Ch. 5 - At the local grocery store, you push a 14.5-kg...Ch. 5 - BIO Predict/Calculate The Force of Running...Ch. 5 - BIO Predict/Calculate Grasshopper Liftoff To...Ch. 5 - Takeoff from an Aircraft Carrier On an aircraft...Ch. 5 - The Ux-versus-time graph for a 1.8-kg object is...Ch. 5 - Predict/Calculate An archer shoots a 0.024-kg...Ch. 5 - An apple of mass m = 0.13 kg falls out of a tree...Ch. 5 - BIO The Fall of T. rex Paleontologists estimate...Ch. 5 - Deep Space 1 The NASA spacecraft Deep Space 1 was...Ch. 5 - Your groceries are in a bag with paper handles....Ch. 5 - BIO A Leafhopper's Leap The motion of jumping...Ch. 5 - Predict/Calculate At the airport, you observe some...Ch. 5 - Prob. 80GPCh. 5 - Two boxes are at rest on a smooth, horizontal...Ch. 5 - You have been hired to help improve the material...Ch. 5 - Prob. 83GPCh. 5 - A baseball of mass m and initial speed U strikes a...Ch. 5 - When two people push in the same direction on an...Ch. 5 - An air-track cart of mass m1 = 0.14 kg is moving...Ch. 5 - BIO Increasing Safety in a Collision Safety...Ch. 5 - BIO Increasing Safety in a Collision Safety...Ch. 5 - BIO Increasing Safety in a Collision Safety...Ch. 5 - BIO Increasing Safety in a Collision Safety...Ch. 5 - Predict/Calculate Referring to Example 5-8 Suppose...Ch. 5 - Referring to Example 5-8 Suppose the force of 30.0...Ch. 5 - Predict/Calculate Referring to Figure 5-13 Suppose...Ch. 5 - Predict/Calculate Referring to Figure 5-13 Suppose...
Additional Science Textbook Solutions
Find more solutions based on key concepts
(a) Show that .
[Hint: Use integration by parts.]
(b) Let be the step function: . (1.95)
Show that .
Introduction to Electrodynamics
7. (II) A mass mat the end of a spring oscillates with a frequency of 0.83 Hz. When an additional 780-g mass is...
Physics: Principles with Applications
(a) Calculate the angular momentum of the Earth in its orbit around the Sun. (b) Compare this angular momentum ...
College Physics
Write each number in decimal form.
38. 4.05 × 100
Applied Physics (11th Edition)
Choose the best answer to each of the following. Explain your reasoning. The age of our solar system is about (...
The Cosmic Perspective Fundamentals (2nd Edition)
8. A 1000 kg car pushes a 2000 kg truck that has a dead battery. When the driver steps on the accelerator, the ...
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
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 car is travelling along a horizontal road in an easterly direction. The car has a mass of 2300 kg and the drag force (friction) acting on the car is a constant 5000 N to the west. The car is initially travelling at a speed of 10 m s‒1 and 20 s later is travelling at a speed of 14 m s‒1. What is the gravitational force on the car? What is the vertical normal (support/reaction) force acting on the car? What is the horizontal force on the cars tyres from the road?arrow_forwardYou have most likely been in an elevator that accelerates upward as it moves toward a higher floor. In this case, you feel heavier. In fact, if you are standing on a bathroom scale at the time, the scale measures a force having a magnitude that is greater than your weight. Therefore, you have tactile and measured evidence that leads you to believe you are heavier in this situation. Are you heavier?arrow_forwardA cable lowers a 1050 kg elevator so that the elevator's speed increases from zero to 4.0 m/s in a vertical distance of 5.9 m. what is the force that the cable exerts on the elevator while lowering it? (Assume that the system is the elevator man)arrow_forward
- What is the direction of the force exerted by the car on the passenger as the car goes over the top of the amusement ride pictured under the following circumstances: (a) The car goes over the top at such a speed that the gravitational force is the only force acting? (b) The car goes over the top faster than this speed? (c) The car goes over the top slower than this speed?arrow_forwardYou walk into an elevator, step onto a scale, and push the "down" button to go directly from the tenth floor to the first floor. You also recall that your normal weight is ww = 635 N If the elevator has an initial acceleration of magnitude 2.40 m/s2m/s2, what does the scale read? Express your answer in newtons.arrow_forwardYou are given two bricks. The mass of the second brick is twice the mass of the first brick. Both bricks are in a state of free fall. The second brick is accelerating at two times the value of gravity. True or falsearrow_forward
- The amusement park ride shown above takes riders straight up a tall tower and then releases an apparatus holding seats. This apparatus free-falls back to Earth and is stopped safely right above the ground. Which of the following indicates the magnitude of the gravitational force exerted on a rider of mass m on the way up and on the way down?arrow_forwardYou walk into an elevator, step onto a scale, and push the "down" button to go directly from the tenth floor to the first floor. You also recall that your normal weight is ww = 635 NN. What does the scale read after the elevator reaches it final constant speed as it heads to the bottom floor? Express your answer in newtonsarrow_forwardSuppose you can communicate with the inhabitants of a planet in another solar system. They tell you that on their planet, whose diameter and mass are 5.0 × 103 km and 3.6 × 1023 kg , respectively, the record for the high jump is 2.0 m. Given that this record is close to 2.4 m on Earth, what would you conclude about your extraterrestrial friends’ jumping ability?arrow_forward
- A person whose weight is 516 N is being pulled up vertically by a rope from the bottom of a cave that is 30.5 m deep. The maximum tension that the rope can withstand without breaking is 593 N. What is the shortest time, starting from rest, in which the person can be brought out of the cave?arrow_forwardThe figure below is for a 7 kg box on a horizontal floor. Initially, you are pushing horizontally on the box and friction is opposing you. Then, you stop pushing the box. Use g = 10 m/s2. v(m/s) 6.0 4.5 3.0 1.5 0.3 0.6 0.9 t(s) Find the gravitational force acting on the box. Find the normal force acting on the box. Assume the frictional force is constant throughout the motion and find the frictional force. Assume the frictional force is constant throughout the motion and find your pushing force. Find the displacement of the box over the entire time shown.arrow_forwardQUESTION 1: If you can exert a pull that is greater than your weight, why can’t you fly off the ground by pulling your belt upward? because the Earth will pull you downward with the same force, so they cancel out because your body exerts the same amount of force on you, so they cancel out because the normal force and your weight cancel out just before you pull your belt upward not enough information is given QUESTION 2: You are pushing a box to the right with a 210-N force. How much force does the box exert on you? less than 210 N, to the left equal to 210 N, to the left equal to 210 N, to the right greater than 210 N, to the leftarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
Newton's Second Law of Motion: F = ma; Author: Professor Dave explains;https://www.youtube.com/watch?v=xzA6IBWUEDE;License: Standard YouTube License, CC-BY