Concept explainers
You are driving a car on a country road when a mosquito splatters on the windshield. Which has the greater magnitude: the force that the car exerted on the mosquito or the force that the mosquito exerted on the car? Or are the magnitudes the same? If they are different, how can you reconcile this fact with Newton’s third law? If they are equal, why is the mosquito splattered while the car is undamaged?
Learn your wayIncludes step-by-step video
Chapter 4 Solutions
University Physics with Modern Physics, Volume 2 (Chs. 21-37); Mastering Physics with Pearson eText -- ValuePack Access Card (14th Edition)
Additional Science Textbook Solutions
Lecture- Tutorials for Introductory Astronomy
An Introduction to Thermal Physics
Cosmic Perspective Fundamentals
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
Life in the Universe (4th Edition)
- A ball is falling toward the ground. Which of the following statements are false? (a) The force that the ball exerts on Earth is equal in magnitude to the force that Earth exerts on the ball, (b) The ball undergoes the same acceleration as Earth. (c) The magnitude of the force the Earth exerts on the ball is greater than the magnitude of the force the ball exerts on the Earth.arrow_forwardAn object experiences no acceleration. Which of the following cannot be true for the object? (a) A single force acts on the object. (b) No forces act on the object. (c) Forces act on the object, but the forces cancel.arrow_forwardA crate remains stationary after it has been placed on a ramp inclined at an angle with the horizontal. Which of the following statements must be true about the magnitude of the frictional force that acts on the crate? (a) It is larger than the weight of the crate. (b) It is at least equal to the weight of the crate. (c) It is equal to sn. (d) It is greater than the component of the gravitational force acting down the ramp. (e) It is equal to the component of the gravitational force acting down the ramp.arrow_forward
- A large crate is suspended from the end of a vertical rope. Is the tension in the rope greater when the crate is at rest or when it is moving upward at constant speed? If the crate is traveling upward, is the tension in the rope greater when the crate is speeding up or when it is slowing down? In each case, explain in terms of Newton’s laws of motion.arrow_forwardNewton's Second Law in 1 Dimension: A 40-kg crate is being lowered with a downward acceleration is 2.0 m/s2 by means of a rope. (a) What is the magnitude of the force exerted by the rope on the crate? What would be the magnitude of the force exerted by the rope if the crate were being raised with an acceleration of 2.0 m/s2?arrow_forwardA man dives off of a cliff. While he is in the air, how does the magnitude of the force that the earth exerts on the diver compare to the magnitude of the force the diver exerts on the earth? The force on the diver is larger in magnitude. The forces have equal magnitudes. The force on the earth is larger in magnitude. The earth exerts zero force on the diver. The diver exerts zero force on the earth.arrow_forward
- Consider applying Newton's second law to a man riding an elevator (perhaps to calculate his acceleration). Which of the following forces must be considered? Choose all that apply. The force that the man's head exerts on his neck. The force of gravity on the elevator. The force the elevator cable exerts on the elevator car. The force that the elevator floor exerts on the man's feet. The force that the man's feet exert on the floor of the elevator. The force of gravity on the man.arrow_forwardA bug is splattered on the windshield of a car traveling along the highway. What does Newton’s third law say about the forces involved in the collision? Why is there such a drastic difference in effects to the bug and car?arrow_forwardYou’re pushing horizontally on a large crate, but it won’t budge. According to Newton’s third law, the crate pushes back on you with the same magnitude of force that you exert on it. Suddenly the crate breaks free and you can now push it along the floor. Now is the force exerted on you by the crate greater than, equal to, or less than the force that you are exerting on the crate? Explain.arrow_forward
- Consider Newton's First Law. Which one of the following is a correct statement ? O The net force acting on object moving at constant velocity must be zero. OThe net force acting on an object moving at constant speed must be zero. The net force acting on an object that is accelerating must be zero. O The net force acting on an object that is decelerating must be zero.arrow_forwardA donkey is urged to pull a wagon. The donkey refuses, citing Newton's third law as a defence: the pull of the donkey on the wagon is equal to, but opposite the pull of the wagon on the donkey. The donkey asks, "If I can never exert a greater force on the wagon than it exerts on me, how can I ever start the wagon moving?" Reply to the donkey's objection and show why their claim is wrong. Hint: In your answer, make sure that the explanation is related to a physics principle covered in this unit.arrow_forwardA book is lying on a table. According to Newton’s First Law, why does the book remain at rest unless acted upon by a force? What forces are acting on the book? (University Physics 1: Kinematics & Dynamics)arrow_forward
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningCollege PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning