
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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ndicate whether the following statements concerning Newton’s Laws are true or false. (Select T-True, F-False. If the first is T and the rest F, enter TFFFF).
A) If a single force acts on an object, the object accelerates. B) If an object isn’t moving, no external forces act on it.
C) If an object is accelerating, a force is acting on it.
D) An object’s velocity will only be in the direction of the net force exerted on it.
E) It is impossible to have motion in the absence of a force.
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- Which of the following statements is incorrect? O Forces are vectors O An object in at rest will have no applied force at all on it. O An object accelerating in a certain direction will have a total force in the same direction. O An object at a constant velocity will have no net force on it. sarrow_forwardA freight train consists of an engine and several identical cars on a straight, level track. Which of the following statements are true? A. If the train is moving at constant speed, the engine must be pulling with a force greater than the train's weight. B. If the train is moving at constant speed, the engine's pull on the first car must exceed that car's backward pull on the engine. C. If the train is moving at constant speed, the engine's pull must be equal to the force of friction. D. If the train is coasting, its inertia makes it slow down and eventually stoparrow_forwardWhich of the following is true? a. Earth exerts a force due to gravity on your body, and your body exerts a smaller force on the Earth, because your mass is smaller than the mass of the Earth. b. The Moon orbits the Earth because the Earth exerts a force on the Moon and the Moon exerts a force equal in magnitude and direction on the Earth. c. A rocket taking off exerts a force on the Earth equal to the force the Earth exerts on the rocket. d. An airplane cruising at a constant speed is not affected by gravity.arrow_forward
- Which of the following statements is not one of Newton’s Laws on motion? a. In the absence of an unbalanced force, an object moves at constant velocityb. For any force there is always an equal but opposite reaction force.c. The force and the acceleration of a body are towards the same direction.arrow_forward2. A chain consists of identical links, each with a mass of 2.5 kg. You grab the top link and hold the chain at rest so that it hangs vertically. a) Draw a free body diagram of the bottom three links (labeled 1, 2, 3). Label all forces and use double subscript notation to denote which object exerts the force and which object is experiencing the force. b) Find the magnitude of the force exerted on link 1 by link 2, in Newtons. c) Find the magnitude of the force exerted on link 2 by link 3, in Newtons.arrow_forwardAn object is at rest on a table. The earth is pulling this object down with a force of magnitude m · g. If we consider this force as the action of an action-reaction pair, what is the reaction force of this force m · g? a) The table pushes the object up b) The object pulls up to the ground c) The earth pushes up the table d)The object pushes the table down e)The table pushes down to the groundarrow_forward
- Box A, weighting 60 N, is placed on a table tilted at angle of 15˚. Another box, B, weighing 40N, is placed on top of A. Both boxes are at rest.A) Draw the free-body diagram for box B. What is the frictional force exerted on A by B? B) Draw the free-body diagram for box A. What is the frictional force exerted on A by the table?arrow_forwardNewton's first law states that: Group of answer choices Ia. n the absence of any net force acting on it, a mechanical system is necessarily at rest. b. In the absence of a non-zero net force acting on it, a mechanical system keeps moving in the same direction at the same speed (including the case v=0). c. For any pair A/B of objects interacting with one another, the force of A acting on B is the equal-opposite of the force of B acting on A. d. The rate of change of the velocity of a system is proportional to the net force acting on it.arrow_forwardA) Write an expression for the component of net force, Fnetx, in the x-direction, in terms of the variables given in the problem statement. Fnetx= Part (c) Write an expression for the magnitude of the normal force, F, acting on the block, in terms of F2, g, and the other variables of the problem. assume that the surface it rests on is ridged Part (d) Find the block's acceleration in the x-direction, ax, in meters per second squared.arrow_forward
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