Applied Physics (11th Edition)
11th Edition
ISBN: 9780134159386
Author: Dale Ewen, Neill Schurter, Erik Gundersen
Publisher: PEARSON
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Textbook Question
Chapter 7.2, Problem 21P
If the angles between the horizontal and the ropes in Problem 19 are changed to 20.0° and 30.0° find the tension in each rope.
19. A rope is attached to two buildings and supports a
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As shown in the attached figure below, three force vectors act on an object. The magnitudes of the forces are F1= 80.0 N, F2 = 60.0 N, and F3 = 40.0 N, where N is the standard SI unit of force. The resultant force acting on the object is given by
A. 40.0 N at an angle 60.0° below +x-axis
B. 60.0 N at an angle 90.0° above +x-axis
C. 20.0 N at an angle 34.3° below +x-axis
D. 180 N at an angle 60.0° below +x-axis
E. 35.5 N at an angle 34.3° above +x-axis
The beam is subjected to the two forces shown. Express each force in Cartesian vector
form. F1 is in the ZY-plane only. You can get the value of F in (Ib) from Table 1.
F=300
F
60
135
60°
24-
25
F, = 630 lb
Using the same force table that you used, a student was given two forces and asked to find a single force that would produce equilibrium with the two forces. The two forces were given by providing one of the components and the angle the force made with the positive x- axis. The two forces were as follows: Force 1: ?? = −2.70 ?; ? = 220.0 degreees Force 2: ?? = 3.20 ?; ? = 60.0 degrees (a) For each force, calculate the magnitude of the force and the mass required to produce it. (b) Calculate the mass and its angle of application to produce equilibrium with these two forces. Please specify your angle as counterclockwise positive with respect to the positive x-axis.
Chapter 7 Solutions
Applied Physics (11th Edition)
Ch. 7.1 - Find the sum of each set of forces acting at the...Ch. 7.1 - 703 N (right); 829 N (left); 125 N (left); 484 N...Ch. 7.1 - Forces of 225 N and 175 N act at the same point....Ch. 7.1 - Three forces with magnitudes of 225 N, 175 N, and...Ch. 7.1 - Prob. 5PCh. 7.1 - Find the sum of each set of vectors. Give angles...Ch. 7.1 - If forces of 1000N acting in a northerly direction...Ch. 7.1 - If two forces of 100N and 50.0 N, respectively,...Ch. 7.1 - Find the sum of each set of vectors. Give angles...Ch. 7.1 - Prob. 10P
Ch. 7.1 - Prob. 11PCh. 7.1 - Find the sum of each set of vectors. Give angles...Ch. 7.1 - Forces of F1 = 1150 N, F2 = 875 N, and F3 = 1450 N...Ch. 7.1 - Four forces, each of magnitude 2750 lb, act at the...Ch. 7.2 - Find the force F that will produce equilibrium in...Ch. 7.2 - Find the force F that will produce equilibrium in...Ch. 7.2 - Find the force F that will produce equilibrium in...Ch. 7.2 - Find the force F that will produce equilibrium in...Ch. 7.2 - Find the force F that will produce equilibrium in...Ch. 7.2 - Find the force F that will produce equilibrium in...Ch. 7.2 - Five persons are having a tug-of-war. Kurt and...Ch. 7.2 - A certain wire can support 6450 lb before it...Ch. 7.2 - The frictional force of a loaded pallet in a...Ch. 7.2 - A bridge has a weight limit of 7.0 tons. How heavy...Ch. 7.2 - A tractor transmission weighing 260N and a...Ch. 7.2 - A skid loader lifts a compressor weighing 672 N...Ch. 7.2 - Find the forces F1 and F2 that produce equilibrium...Ch. 7.2 - Find the forces F1 and F2 that produce equilibrium...Ch. 7.2 - Find the forces F1 and F2 that produce equilibrium...Ch. 7.2 - Find the forces F1 and F2 that produce equilibrium...Ch. 7.2 - Find the forces F1 and F2 that produce equilibrium...Ch. 7.2 - Find the forces F1 and F2 that produce equilibrium...Ch. 7.2 - A rope is attached to two buildings and supports a...Ch. 7.2 - A rope is attached to two buildings and supports a...Ch. 7.2 - If the angles between the horizontal and the ropes...Ch. 7.2 - Find the tension in the horizontal supporting...Ch. 7.2 - Find the tension in the horizontal supporting...Ch. 7.2 - An automobile of mass 1550 kg is towed at a steady...Ch. 7.2 - A vehicle that weighs 16,200 N is parked on a 20.0...Ch. 7.2 - Find the tension in the cable and the compression...Ch. 7.2 - The crane shown in Fig. 7.26 is supporting a load...Ch. 7.2 - The crane shown in Fig. 7.27 is supporting a load...Ch. 7.3 - Given:F=16.0lbr=6.00ft=?Ch. 7.3 - Given:F=100Nr=0.420m=?Ch. 7.3 - Prob. 3PCh. 7.3 - Prob. 4PCh. 7.3 - Given:=65.4Nmr=35.0cmF=?Ch. 7.3 - Given:F=630Nr=74.0cm=?Ch. 7.3 - If the torque on a shaft of radius 2.37 cm is 38.0...Ch. 7.3 - If a force of 56.2 lb is applied to a torque...Ch. 7.3 - A motorcycle head bolt is torqued to 25.0 N m....Ch. 7.3 - A force of 112 N is applied to a shaft of radius...Ch. 7.3 - A torque of 175 lb ft is needed to free a large...Ch. 7.3 - A torque wrench reads 14.5 N m. If its length is...Ch. 7.3 - The torque on a shaft of radius 3.00 cm is 12.0 N...Ch. 7.3 - An engine bolt is torqued to 30.0 N m. If the...Ch. 7.3 - A mower bolt is torqued to 65.0 N m. If the length...Ch. 7.3 - An automobile bolt is torqued to 27.0 N m. If the...Ch. 7.3 - A torque wrench reads 25 lb ft. (a) If its length...Ch. 7.3 - If 13 N m of torque is applied to a bolt with an...Ch. 7.3 - If the torque required to loosen a nut on the...Ch. 7.3 - If the torque required to loosen a nut on the...Ch. 7.3 - A truck mechanic must loosen a rusted lug nut. If...Ch. 7.3 - An agricultural mechanic tries to loosen a nut on...Ch. 7.4 - Find the force F that will produce equilibrium for...Ch. 7.4 - Find the force F that will produce equilibrium for...Ch. 7.4 - Find the force F that will produce equilibrium for...Ch. 7.4 - Find the force F that will produce equilibrium for...Ch. 7.4 - Find the force F that will produce equilibrium for...Ch. 7.4 - Find the force F that will produce equilibrium for...Ch. 7.4 - Find the force F that will produce equilibrium for...Ch. 7.4 - Find the force F that will produce equilibrium for...Ch. 7.4 - Prob. 9PCh. 7.4 - A 5000-lb truck is 20.0 ft from one end of a...Ch. 7.4 - Prob. 11PCh. 7.4 - An auto transmission of mass 165 kg is located...Ch. 7.4 - A bar 8.00 m long supports masses of 20.0 kg on...Ch. 7.4 - Two painters, each of mass 75.0 kg, stand on a...Ch. 7.4 - Two painters, one of mass 75.0 kg and the other...Ch. 7.4 - Two painters stand on a 10.00-m scaffold. One, of...Ch. 7.4 - An auto differential with a mass of 76.0 kg is...Ch. 7.4 - Prob. 18PCh. 7.5 - Solve for F1 : 30.0F1 = (14.0)(18.0) +...Ch. 7.5 - Solve for Fw : (12.0)(15.0) + 45.0Fw =...Ch. 7.5 - Two workers carry a uniform 15.0-ft plank that...Ch. 7.5 - Juan and Pablo carry a load weighing 720 N on a...Ch. 7.5 - A wooden beam is 3.30 m long and has its center of...Ch. 7.5 - An auto engine weighs 650lb and is located 4.00 ft...Ch. 7.5 - A bridge across a country stream weighs 89,200 N....Ch. 7.5 - A window washers scaffold 12.0 ft long and...Ch. 7.5 - A porch swing weighs 29.0 lb. It is 4.40 ft long...Ch. 7.5 - Prob. 10PCh. 7.5 - A bridge has a mass of 1.60 104 kg, is 21.0 m...Ch. 7.5 - A uniform steel beam is 5.00 m long and weighs 360...Ch. 7.5 - A wooden pole is 4.00 m long, weighs 315 N, and...Ch. 7.5 - A bridge has a mass of 2.60 104 kg, is 32.0 m...Ch. 7.5 - An auto engine of mass 295 kg is located 1.00 m...Ch. 7.5 - A 125-kg horizontal beam is supported at each end....Ch. 7.5 - Prob. 17PCh. 7.5 - The uniform bar in Fig. 7.49 is 5.00 m long and...Ch. 7.5 - Find the magnitude, direction, and placement (from...Ch. 7.5 - Find the magnitude, direction, and placement (from...Ch. 7 - Concurrent forces act at a. two or more different...Ch. 7 - The resultant force is a. the last force applied....Ch. 7 - A moving object a. can be in equilibrium. b. is...Ch. 7 - The study of an object in equilibrium is called a....Ch. 7 - Torque is a. applied force in rotational motion....Ch. 7 - The first condition of equilibrium states that a....Ch. 7 - In the second condition of equilibrium. a....Ch. 7 - The center of gravity of an object a. is always at...Ch. 7 - Is motion produced every time a force is applied...Ch. 7 - Prob. 10RQCh. 7 - Define equilibrium.Ch. 7 - In what direction does the force due to gravity...Ch. 7 - What may be said about concurrent forces whose sum...Ch. 7 - What is a force diagram?Ch. 7 - Is the length of the pedal necessarily the true...Ch. 7 - In your own words, explain the second condition of...Ch. 7 - What is the primary consideration in the selection...Ch. 7 - List three examples from daily life in which you...Ch. 7 - Is the center of gravity of an object always at...Ch. 7 - Prob. 20RQCh. 7 - Find the sum of the following forces acting at the...Ch. 7 - Forces of 275 lb and 225 lb act at the same point....Ch. 7 - Prob. 3RPCh. 7 - Prob. 4RPCh. 7 - Prob. 5RPCh. 7 - Forces of F1 = 1250 N, F2 = 625 N, and F3 = 1850 N...Ch. 7 - Eight people are involved in a tug-of-war. The...Ch. 7 - A bridge has a weight limit of 14.0 tons. What is...Ch. 7 - The x-components of three vectors are Fx, 375...Ch. 7 - If Wy=600N and Wx=900N, what are the magnitude and...Ch. 7 - Find forces F1 and F2 that produce equilibrium in...Ch. 7 - Prob. 12RPCh. 7 - Find the tension in the cable and the compression...Ch. 7 - Find the tension in each cable in Fig. 7.51.Ch. 7 - Find the tension in each cable in Fig. 7.52.Ch. 7 - Find the tension and the compression in Fig. 7.53.Ch. 7 - A man is changing a flat tire using a tire iron...Ch. 7 - A torque of 81.0 lb ft is produced by a torque arm...Ch. 7 - A hanging sign has mass 200kg. If the tension in...Ch. 7 - A scaffold supports a bricklayer and bricks...Ch. 7 - Two ladders at the ends of a scaffold support a...Ch. 7 - How far from the light end of a 68.0-cm bat would...Ch. 7 - A bridge has mass 8000kg. If a 3200-kg truck stops...Ch. 7 - If the truck in Problem 23 stops 7.00 m from one...Ch. 7 - A uniform 2.20-kg steel bar with length 2.70 m is...Ch. 7 - Find the vertical force needed to support the...Ch. 7 - A horizontal cable supports the boom of a crane....Ch. 7 - Archeologists in Egypt are attempting to open a...Ch. 7 - Sean and Greg are on a job site standing on two...Ch. 7 - Maria has severe arthritis and can apply a maximum...Ch. 7 - Kristas flagpole bracket is mounted at an angle of...Ch. 7 - Prob. 5AC
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