Concept explainers
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. P5.41), Nick pulls on the loose end of the rope with such a force that the spring scale reads 250 N. Nick’s true weight is 320 N, and the chair weighs 160 N. Nick’s 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 P5.41 Problems 41 and 44.
Trending nowThis is a popular solution!
Chapter 5 Solutions
Physics for Scientists and Engineers with Modern Physics
Additional Science Textbook Solutions
Physical Science
Tutorials in Introductory Physics
Physics for Scientists and Engineers with Modern Physics
Introduction to Electrodynamics
University Physics (14th Edition)
Introduction To Health Physics
- Two objects, m1 = 3.00 kg and m2 = 8.50 kg, are attached by a massless cord passing over a frictionless pulley as shown in Figure P5.51. Assume the horizontal surface is frictionless. a. Draw a free-body diagram for each of the two objects. b. What is the tension in the cord? c. What is the magnitude of the acceleration of the two objects? FIGURE P5.51 Problems 51 and 65.arrow_forwardA heavy chandelier with mass 125 kg is hung by chains in equilibrium from the ceiling of a concert hall as shown in Figure P5.77, with 1 = 37.0 and 2 = 64.0. Assuming the chains are massless, what are the tensions FT1, FT2, and FT3 in the three chains? FIGURE P5.77arrow_forwardTwo blocks connected by a rope of negligible mass are being dragged by a horizontal force (Fig. P5.13). Suppose F = 68.0 N, m1 = 12.0 kg, m2 = 18.0 kg, and the coefficient of kinetic friction between each block and the surface is 0.100. (a) Draw a free-body diagram for each block. Determine (b) the acceleration of the system and (c) the tension T in the rope. Figure P5.13arrow_forward
- In the system shown in Figure P5.23, a horizontal force Facts on an object of mass m2 = 8.00 kg . The horizontal surface is frictionless. Consider the acceleration of the sliding object as a function of F. (a) For what values of F, does the object of mass m = 2.00 kg accelerate upward? Answer! (b) For what values of F, is the tension in the cord zero? Answer! () Plot the acceleration of the m, object versus F. Include values of F, from - 100 N to +100 N. SNIPParrow_forwardA fisherman is fishing from a bridge and is using a "30.0-N test line." In other words, the line will sustain a maximum force of 30.0 N without breaking. What is the weight of the heaviest fish that can be pulled up vertically, when the line is reeled in (a) at constant speed and (b) with an acceleration whose magnitude is 2.16 m/s2?arrow_forwardA skier with a mass of 60 kg is sliding down a snowy slope, the slope with an angle of 30 degrees above the horizontal as shown in the figure. Find Normal force N for the skier as shown in the figure if friction is known to be 45.0 N. Assuming no air resistance and g=10m/s^2 a) 600 N b) 519.62 N c) 45 N d) 38.97 Narrow_forward
- The parachute on a race car of weight 8010 N opens at the end of a quarter mile run when the car is traveling at 35.6 m/s. What total retarding force must be supplied by the parachute to stop the car in a distance of 1070 m?arrow_forwardA 403.280 kg car is traveling down a 25-degree slope. At the instant that the speed is 13 m/s, the driver applied the brakes. What constant force (F), parallel to the road, must be provided by the brakes if the car is to stop in 68.310 meters? CHOICES: A. 9043.234 N B. 2908.952 N C. 8635.722 N D. 1292.535 N E. 5084.885 Narrow_forwardA spaceship lifts off vertically from the Moon, where g = 1.6 m/s2. If the ship has an upward acceleration of 1.0 m/s2 as it lifts off, what is the magnitude of the force exerted by the ship on its pilot, who weighs 735 N on Earth?arrow_forward
- In a laboratory experiment, an initially stationary electron (mass = 9.11 x 10–31 kg) undergoes a constant acceleration through 2.4 cm, reaching a speed of 5.7 x 106 m/s at the end of that distance. What are (a) the magnitude of the force accelerating the electron and (b) the electron's weight?arrow_forwardAn 80 kg person is standing on a scale in an elevator. Find the weight that the scale reads when the elevator is: a) At rest, b) Moving upward at constant velocity, c) Moving down at constant velocity, d) Accelerating upward at 1.5 m/s2, e) Accelerating downward at 0.5 m/s2, f) The cable breaks and the elevator goes into free fall.arrow_forwardA person in a kayak starts paddling, and it accelerates from 0 to 0.8 mile/hour in adistance of 0.8km. If the combined mass of the person and the kayak is 80kg, whatis the magnitude of the net force acting on the kayak?arrow_forward
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningPhysics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
- Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning