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 (14th Edition)
Additional Science Textbook Solutions
Chemistry: A Molecular Approach (4th Edition)
Biology: Life on Earth (11th Edition)
Human Anatomy & Physiology (2nd Edition)
Campbell Biology (11th Edition)
Applications and Investigations in Earth Science (9th Edition)
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (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
- Newton's third law tells us that for every force in nature, there is an equal and opposite reaction force. In the previous question ("A crate is sitting at a top of a ramp, which is inclined at an angle"), what is the reaction force associated with the normal force acting on the box? O The weight force acting on the crate O The component of the weight force perpendicular to the surface O The normal force exerted by the crate on the ramp O The static friction force O Some other force O There is no reaction force to the normal forcearrow_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_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_forward
- A ball of mass 0.5 kg is tossed vertically upwards. What is the magnitude and direction of the net force acting on the ball, ( a ) as it moves upwards ? ( b ) as it moves downwards ? ( c ) at the highest point of its vertical climb. Do any of your answers change if the ball was kicked at a 45° angle with the horizontal plane? Ignore the air resistance.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_forwardConsider 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_forward
- A 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_forwardTrain cars are connected by couplers, which are under tension as the locomotive pulls the train. Imagine you are on a train speeding up with a constant acceleration. As you move through the train from the locomotive to the last car, measuring the tension in each set of couplers, does the tension increase, decrease, or stay the same? When the engineer applies the brakes,the couplers are under compression. How does this compression force vary from the locomotive to the last car? (Assume only the brakes on the wheels of the engine are applied.)arrow_forwardWhich of the following statements BEST describes Newton’s second law of motion? The object is either at rest or it moves with constant velocity when there is no net force acting on it. The force acting on an object is equal to its mass times its acceleration. An object with mass m subjected to a net force will have acceleration equal to the net force divided by its mass. When there is a net force acting on an object, the object moves with constant velocity equal to the net force divided by its mass.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