The picture below shows Jamal pushing with a 100-Newton (N) force on a large box. Neither Jamal nor the box move when he pushes on it.100 newtonsWhat force is the box applying on Jamal?AaON force in the opposite direction that Jamal is pushing itBa 20 N force in the opposite direction that Jamal is pushing ita 100 N force in the opposite direction that Jamal is pushing ita 60 N force in the opposite direction that Jamal is pushing itC2u21Illuminate EducationTM, Inc.EThp

Name: The picture below shows Jamal pushing with a 100-Newton (N) force on
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Description: The picture below shows Jamal pushing with a 100-Newton (N) force on a large box. Neither Jamal nor the box move when he pushes on it.100 newtonsWhat force is the box applying on Jamal?AaON force in the opposite direction that Jamal is pushing itBa

Given data The force applied by the Jamal on the large box is given as FJ = 100 N.

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The picture below shows Jamal pushing with a 100-Newton (N) force on a large box. Neither Jamal nor the box move when he pushes on it. 100 newtons What force is the box applying on Jamal? aON force in the opposite direction that Jamal is pushing it a 20 N force in the opposite direction that Jamal is pushing it a 100 N force in the opposite direction that Jamal is pushing it a 60 N force in the opposite direction that Jamal is pushing it OO O 0

The picture below shows Jamal pushing with a 100-Newton (N) force on a large box. Neither Jamal nor the box move when he pushes on it. 100 newtons What force is the box applying on Jamal? aON force in the opposite direction that Jamal is pushing it a 20 N force in the opposite direction that Jamal is pushing it a 100 N force in the opposite direction that Jamal is pushing it a 60 N force in the opposite direction that Jamal is pushing it OO O 0

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter4: The Laws Of Motion

Section: Chapter Questions

Problem 42P: A 1 000-kg car is pulling a 300-kg trailer. Together, the car and trailer move forward with an...

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A large crate of mass m is placed on the flatbed of a truck but not tied down. As the truck accelerates forward with acceleration a, the crate remains at rest relative to the truck. What force causes the crate to accelerate? (a) the normal force (b) the gravitational force (c) the friction force (d) the ma force exerted by the crate (e) No force is required.
A 1 000-kg car is pulling a 300-kg trailer. Together, the car and trailer move forward with an acceleration of 2.15 m/s2. Ignore any force of air drag on the car and all frictional forces on the trailer. Determine (a) the net force on the car, (b) the net force on the trailer, (c) the force exerted by the trailer on the car, and (d) the resultant force exerted by the car on the road.
The two barges shown here are coupled by a cable of negligible mass. The mass of the front barge is 2.00103kgand the mass of the rear barge is 3.00103kg . A tugboat pulls the front barge with a horizontal force of magnitude 20.0103N . and the frictional forces of the water on the front and rear barges are 8.00103Nand 10.0103N . respectively. Find the horizontal acceleration of the barges and the tension in the connecting cable.
An inventive child named Nick wants to reach an apple in a tree without climbing the tree. Sitting in a chair connected to a rope that passes over a frictionless pulley (Fig. P4.45), Nick pulls on the loose end of the rope with such a force that the spring scale reads 250 N. Nicks true weight is 320 N, and the chair weighs 160 N. Nicks feet are not touching the ground. (a) Draw one pair of diagrams showing the forces for Nick and the chair considered as separate systems and another diagram for Nick and the chair considered as one system. (b) Show that the acceleration of the system is upward and find its magnitude. (c) Find the force Nick exerts on the chair. Figure P4.45 Problems 45 and 46. 46. In the situation described in Problem 45 and Figure P4.45, the masses of the rope, spring balance, and pulley are negligible. Nicks feet are not touching the ground. (a) Assume Nick is momentarily at rest when he stops pulling down on the rope and passes the end of the rope to another child, of weight 440 N, who is standing on the ground next to him. The rope does not break. Describe the ensuing motion. (b) Instead, assume Nick is momentarily at rest when he ties the end of the rope to a strong hook projecting from the tree trunk. Explain why this action can make the rope break.
You are riding a luxury bus. In front of you is a cup of tea resting on the seat-back tray. Which of the following events may lead to spilled tea in your lap? The bus a. remains at rest, b. moves at constant velocity, c. speeds up or d. slows down. Dont worry about other circumstances such as a person knocking your cup over. (More than one choice may be correct.) Explain your answers.
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A 5.00-kg block is placed on top of a 10.0-kg block (Fig. P5.50). A horizontal force of 45.0 N is applied to the 10-kg block, and the 5-kg block is tied to the wall. The coefficient of kinetic friction between all moving surfaces is 0.200. (a) Draw a free-body diagram for each block and identify the action-reaction forces between the blocks. (b) Determine the tension in the string and the magnitude of the acceleration of the 10-kg block. Figure P5.50
Suppose that you are holding a cup of coffee in your hand. Identify all forces on the cup and the reaction to each
Train Collision and Newtons First Law A group of college students discusses the train collision case study. Use Newtons first law to decide which underlined statements are correct and which are false. Explain your answers. Shannon: This newspaper says that the people who got really hurt were either standing up or sitting in a forward-facing seat. Those people got thrown forward when the train stopped. Avi: Thats why there are seat belts in cars. If you get into a crash, the force can throw you through the windshield. Cameron: There is no force that throws you through the windshield. You fly through the windshield because you are already moving and it would take a force to stop you from going forward. Thats why theres a seat belt. Avi: That doesnt make sense. Because then you would need a force to stop you from flying through the windshield even when you just stop slowly at a red light. Cameron: Thats right, but when you slow down slowly, you dont need such a big force and the car seat can take care of it. Shannon: The seat? I dont think a seat can exert a force. It cant move on its own or hold you. Thats why the people who were sitting forward on the train were hurt. The people who were sitting backward had the back of the seat to block them.
As shown in Figure CQ5.22, student A, a 55-kg girl, sits on one chair with metal runners, at rest on a classroom floor. Student B, an 80-kg boy, sits on an identical chair. Both students keep their feet off the floor. A rope runs from student As hands around a light pulley and then over her shoulder to the hands of a teacher standing on the floor behind her. The low-friction axle of the pulley is attached to a second rope held by student B. All ropes run parallel to the chair runners. (a) If student A pulls on her end of the rope, will her chair or will Bs chair slide on the floor? Explain why. (b) If instead the teacher pulls on his rope end, which chair slides? Why this one? (c) If student B pulls on his rope, which chair slides? Why? (d) Now the teacher ties his end of the rope to student As chair. Student A pulls on the end of the rope in her hands. Which chair slides and why? Figure CQ5.22