Concept explainers
Two adults and a child want to push a wheeled cart in the direction marked x in Fig. P4.33. The two adults push with horizontal forces
Learn your wayIncludes step-by-step video
Chapter 4 Solutions
University Physics with Modern Physics, Books a la Carte Edition; Modified MasteringPhysics with Pearson eText -- ValuePack Access Card -- for ... eText -- Valuepack Access Card (14th Edition)
Additional Science Textbook Solutions
Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
College Physics: A Strategic Approach (3rd Edition)
University Physics (14th Edition)
College Physics
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
Essential University Physics: Volume 1 (3rd Edition)
- A particle of mass 4.00 kg, moving on a horizontal table top, has an acceleration vector (in m/s2) given by a =9.10ı^ + 1.80ȷ^, where ı^ and ȷ^ are the unit vectors along the x and y axes, respectively. This particle is subjected to two horizontal forces, expressed in newtons by F⃗ 1=2.00ı^ + 3.00ȷ^ and F2. Calculate the force F2 in newtons. Give your answer to one decimal placearrow_forwardTwo horizontal forces, E and F, are acting on a box, but only is shown in the drawing. E can point either to the right or to the left. The box moves only along the x axis. There is no friction between the box and the surface. Suppose that = +5.8 N and the mass of the box is 4.5 kg. Find the magnitude and direction of when the acceleration of the box is (a) +6.7 m/s², (b) -6.7 m/s², and (c) 0 m/s².arrow_forwardTwo horizontal forces, F and F, are acting on a box, but only is shown in the drawing. F₂ can point either to the right or to the left. The box moves only along the x axis. There is no friction between the box and the surface. Suppose that E₁ = +4.0 N and the mass of the box is 3.3 kg. Find the magnitude and direction of F₂ when the acceleration of the box is (a) +6.0 m/s², (b) -6.0 m/s², and (c) 0 m/s². (a) F₂ (b) F₂ (c) F₂ = = = ► ➜ i i +Xarrow_forward
- A man is trying to push a 75.0 kg rock across the ground by applying a constant force P at an angle θ = 27.5 ̊ below the horizontal. The coefficients of friction between the rock and the ground are μk = 0.430 and μs = 0.570. (a) If the rock is initially at rest, what force does the man need to apply to get it to start moving? (b) If the rock is already in motion, what force does he need to apply to get it accelerate at 2.75 m/s2?arrow_forwardTwo horizontal forces, and F, are acting on a box, but only F is shown in the drawing. F₂2 can point either to the right or to the left. The box moves only along the x axis. There is no friction between the box and the surface. Suppose that F₁ = +9.4 N and the mass of the box is 3.6 kg. Find the magnitude and direction of F₂ when the acceleration of the box is (a) +5.1 m/s², (b) -5.1 m/s², and (c) 0 m/s². F₁ <-+xarrow_forwardYou are pushing a wooden crate against a rubber floor. The two surfaces have a static coefficient of friction of 0.45 and a kinetic coefficient of friction of 0.38. The floor is horizontal, and the crate has a mass of 25.0 kg, and is initially at rest. You are pushing with a horizontal force of 155 N. What is the magnitude of the force of friction in this case? Give your answer in units of N, to three significant figures.arrow_forward
- In the figure, a tin of anti-oxidants (m, magnitude F = 6.3 N acts on the corned beef tin, which has a downward acceleration of 4.0 m/s2. What are (a) the tension in the connecting cord and (b) angle B? 4.4 kg) on a frictionless inclined surface is connected to a tin of corned beef (m, = 2.2 kg). The pulley is massless and frictionless. An upward force of (a) Number Units (b) Number Unitsarrow_forwardA chair of weight 75.0 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 38.0 NN directed at an angle of 34.0 DEGREES below the horizontal and the chair slides along the floor. Using Newton's laws, calculate nnn, the magnitude of the normal force that the floor exerts on the chair.arrow_forwardYou are pushing a rubber crate against a concrete floor. The two surfaces have a static coefficient of friction of 0.61 and a kinetic coefficient of friction of 0.49. The floor is horizontal, and the crate has a mass of 25.0 kg, and is initially at rest. You are pushing with a horizontal force of 100 N. What is the magnitude of the force of friction in this case? Give your answer in units of N, to three significant figures.arrow_forward
- An athlete pulls box E using an inextensible rope P while being resisted by another inextensible rope S. Let P be the tension force on rope P and S be the tension force on rope S. Consider particle analysis involving only forces P and S. P E S 2. If P = 495N, S = 465N, 0 = 10° and a = 29° , which of the following is closest to the magnitude and direction of R? 322 N, 32.9degs 161.2 N, 81.8degs 322 N, 32.9deg 161.2N, 81.1degaarrow_forwardA monkey pushes a box of mass 25 kg in a straight line across a rough floor. The applied force F has magnitude 85 N and acts downward at an angle 0 = 10° with respect to the horizontal, as shown below. The box is initially at rest at the position x/ a). Find the coefficient of friction between the box and the floor. and it has speed v2 = 0.55 m/s at position x2 = 3.50 m. 0 m, b). What is the net work done? c). How much work (magnitude and sign) is done by the friction force? m Hint: this q involves constant acceleration, Newton's laws, workarrow_forwardA 39 kg girl and a 7.7 kg sled are on the frictionless ice of a frozen lake, 10 m apart but connected by a rope of negligible mass. The girl exerts a horizontal 5.2 N force on the rope. What are the acceleration magnitudes of (a) the sled and (b) the girl? (c) How far from the girl's initial position do they meet? (a) Number Units (b) Number i Units (c) Number i Units 尾arrow_forward
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON