EBK PHYSICS
5th Edition
ISBN: 9780134051796
Author: Walker
Publisher: YUZU
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Chapter 6, Problem 25PCE
In Figure 6-42 we see two blocks connected by a string and tied to a wall. The mass of the lower block is 1.0 kg, the mass of the upper block is 2.0 kg. Given that the angle of the incline is 31°, find the tensions in (a) the string connecting the two blocks and (b) the string that is tied to the wall.
Figure 6-42
Problem 25
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Kirchoff's Laws. A circuit contains 3 known resistors, 2 known batteries, and 3 unknown currents as shown.
Assume the current flows through the circuit as shown (this is our initial guess, the actual currents may be
reverse). Use the sign convention that a potential drop is negative and a potential gain is positive.
E₂ = 8V
R₁₁ = 50
R₂ = 80
b
с
w
11
www
12
13
E₁ = 6V
R3 = 20
a) Apply Kirchoff's Loop Rule around loop abefa in the clockwise direction starting at point a. (2 pt).
b) Apply Kirchoff's Loop Rule around loop bcdeb in the clockwise direction starting at point b. (2 pt).
c) Apply Kirchoff's Junction Rule at junction b (1 pt).
d) Solve the above 3 equations for the unknown currents I1, 12, and 13 and specify the direction of the current
around each loop. (5 pts)
I1 =
A
12 =
A
13 =
A
Direction of current around loop abef
Direction of current around loop bcde
(CW or CCW)
(CW or CCW)
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Chapter 6 Solutions
EBK PHYSICS
Ch. 6.1 - A block rests on a rough, horizontal surface, as...Ch. 6.2 - When a mass is attached to a certain spring, the...Ch. 6.3 - Suppose the tension in the clothesline in Quick...Ch. 6.4 - Three boxes are connected by ropes and pulled...Ch. 6.5 - A system consists of an object with mass m and...Ch. 6 - A clothesline always sags a little, even if...Ch. 6 - In the Jurassic Park sequel, The Lost World, a man...Ch. 6 - When a traffic accident is investigated, it is...Ch. 6 - In a car with rear-wheel drive, the maximum...Ch. 6 - A train typically requires a much greater distance...
Ch. 6 - Give some everyday examples of situations in which...Ch. 6 - At the local farm, you buy a flat of strawberries...Ch. 6 - It is possible to spin a bucket of water in a...Ch. 6 - Water sprays off a rapidly turning bicycle wheel....Ch. 6 - Can an object be in translational equilibrium if...Ch. 6 - Prob. 11CQCh. 6 - The gravitational attraction of the Earth is only...Ch. 6 - A popular carnival ride has passengers stand with...Ch. 6 - Referring to Question 13, after the cylinder...Ch. 6 - Your car is stuck on an icy side street. Some...Ch. 6 - The parking brake on a car causes the rear wheels...Ch. 6 - BIO The foot of your average gecko is covered with...Ch. 6 - Discuss the physics involved in the spin cycle of...Ch. 6 - The gas pedal and the brake pedal are capable of...Ch. 6 - In the movie 2001: A Space Odyssey, a rotating...Ch. 6 - When rounding a corner on a bicycle or a...Ch. 6 - Predict/Explain You push two identical bricks...Ch. 6 - Predict/Explain Two drivers traveling side-by-side...Ch. 6 - A 1.8-kg block slides on a horizontal surface with...Ch. 6 - A child goes down a playground slide with an...Ch. 6 - What is the minimum horizontal force F needed to...Ch. 6 - What is the minimum horizontal force F needed to...Ch. 6 - The three identical boxes shown in Figure 6-33...Ch. 6 - To move a large crate across a rough floor, you...Ch. 6 - Predict/Calculate A 37-kg crate is placed on an...Ch. 6 - Coffee To Go A person places a cup of coffee on...Ch. 6 - A mug rests on an inclined surface, as shown in...Ch. 6 - Predict/Calculate Force Times Distance At the...Ch. 6 - Prob. 13PCECh. 6 - A certain spring has a force constant k. (a) If...Ch. 6 - A certain spring has a force constant k. (a) If...Ch. 6 - Pulling up on a rope you lift a 7.27-kg bucket of...Ch. 6 - When a 9.09-kg mass is placed on top of a vertical...Ch. 6 - Predict/Calculate A backpack full of books...Ch. 6 - Two springs, with force constants k1= 150N/m and...Ch. 6 - Predict/Calculate Illinois Jones is being pulled...Ch. 6 - Predict/Calculate A spring with a force constant...Ch. 6 - A spring is suspended vertically from the ceiling...Ch. 6 - Mechanical Advantage The pulley system shown in...Ch. 6 - Pulling the string on a bow back with a force of...Ch. 6 - In Figure 6-42 we see two blocks connected by a...Ch. 6 - BIO Traction After a skiing accident, your leg is...Ch. 6 - Two blocks are connected by a string, as shown in...Ch. 6 - Predict/Calculate The system shown in Figure 6-45...Ch. 6 - Predict/Explain (a) Referring to the hanging...Ch. 6 - BIO Spiderweb Forces An orb-weaver spider sits in...Ch. 6 - A 0.15-kg ball is placed in a shallow wedge with...Ch. 6 - Predict/Calculate A picture hangs on the wall...Ch. 6 - Predict/Calculate You want to nail a 1.6-kg board...Ch. 6 - Prob. 34PCECh. 6 - In Example 6-13 (Connected Blocks), suppose m1 and...Ch. 6 - Predict/Explain Suppose m1 and m2 in Example 6-14...Ch. 6 - Three boxes of masses m, 2m, and 3m are connected...Ch. 6 - Find the acceleration of the masses shown in...Ch. 6 - Predict/Calculate (a) If the hanging mass m3 in...Ch. 6 - Two blocks are connected by a string, as shown in...Ch. 6 - Predict/Calculate A 3 50-kg block on a smooth...Ch. 6 - Predict/Calculate A 7.7-N force pulls horizontally...Ch. 6 - Predict/Calculate (a) Find the magnitude of the...Ch. 6 - A car drives with constant speed on an elliptical...Ch. 6 - A puck attached to a string undergoes circular...Ch. 6 - BIO Bubble Net Fishing Humpback whales sometimes...Ch. 6 - When you take your 1900-kg car out for a spin, you...Ch. 6 - BIO A Human Centrifuge To test the effects of high...Ch. 6 - A car goes around a curve on a road that is banked...Ch. 6 - Clearview Screen Large ships often have circular...Ch. 6 - Predict/Calculate (a) As you ride on a Ferris...Ch. 6 - Driving in your car with a constant speed of v =...Ch. 6 - CE If you weigh yourself on a bathroom scale at...Ch. 6 - CE BIO Maneuvering a Jet Humans lose consciousness...Ch. 6 - CE BIO Gravitropism As plants grow, they tend to...Ch. 6 - BIO Human-Powered Centrifuge One of the hazards of...Ch. 6 - Predict/Calculate A 9 3-kg box slides across the...Ch. 6 - A child goes down a playground slide that is...Ch. 6 - Spin-Dry Dragonflies Some dragonflies splash down...Ch. 6 - The da Vinci Code Leonardo da Vinci (1452-1519) is...Ch. 6 - A 4 5-kg sled is pulled with constant speed across...Ch. 6 - A 0 045-kg golf ball hangs by a string from the...Ch. 6 - A physics textbook weighing 22 N rests on a desk....Ch. 6 - Predict/Calculate The blocks shown in Figure 6-64...Ch. 6 - A Conical Pendulum A 0 075-kg toy airplane is tied...Ch. 6 - A tugboat tows a barge at constant speed with a...Ch. 6 - Predict/Calculate Two blocks, stacked one on top...Ch. 6 - Predict/Calculate In a daring rescue by helicopter...Ch. 6 - Predict/Calculate A light spring with a fore...Ch. 6 - Predict/Calculate The blocks in Figure 6-69 have...Ch. 6 - Predict/Calculate Playing a Violin The tension in...Ch. 6 - Predict/Calculate A 9 8-kg monkey hangs from a...Ch. 6 - As your plane circles an airport, it moves in a...Ch. 6 - At a playground, a 22-kg child sits on a spinning...Ch. 6 - A 2.0-kg box rests on a plank that is inclined at...Ch. 6 - A wood block of mass m rests on a larger wood...Ch. 6 - A hockey puck of mass m is attached to a string...Ch. 6 - Predict/Calculate A popular ride at amusement...Ch. 6 - A Conveyor Belt A box is placed on a conveyor belt...Ch. 6 - As part of a circus act, a person drives a...Ch. 6 - On the straight-line segment II in Figure 6-76 (b)...Ch. 6 - 82. Rank the straight segments I, II, and III in...Ch. 6 - In use on a typical human nose, the end-to-end...Ch. 6 - Predict/Calculate Referring to Example 6-3 Suppose...Ch. 6 - Predict/Calculate Referring to Example 6-3 The...Ch. 6 - Referring to Example 6-13 Suppose that the mass on...Ch. 6 - Referring to Example 6-15 (a) At what speed will...
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