COLLEGE PHYSICS - LCPO
4th Edition
ISBN: 9780134700427
Author: Knight
Publisher: PEARSON
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Textbook Question
Chapter 5, Problem 11P
The forces in Figure P5.11 are acting on a 2.0 kg object. Find the values of ax and ay, the x- and y-components of the object’s acceleration.
Figure P5.11
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Shown is the velocity graph of a 2.0 kg object as it moves along the x-axis. What is the net force acting on this object at t = 1 s? At 4 s? At 7 s?
5.68 CP In Fig. P5.68
m1 20.0 kg and α =
53.1º. The coefficient of
kinetic friction between the
block and the incline is k
=
0.40. What must be the mass
m2
of the hanging block if it
is to descend 12.0 m in the
first 3.00 s after the system is
released from rest?
=
Figure P5.68
m₁
α
m2
5.68 CP In Fig. P5.68
m₁ = 20.0 kg and a =
53.1°. The coefficient of
..
kinetic friction between the
block and the incline is μ =
0.40. What must be the mass
m₂ of the hanging block if it
is to descend 12.0 m in the
first 3.00 s after the system is
released from rest?
Figure P5.68
m₁
α
m₂
Chapter 5 Solutions
COLLEGE PHYSICS - LCPO
Ch. 5 - An object is subject to two forces that do not...Ch. 5 - Are the objects described here in static...Ch. 5 - Prob. 3CQCh. 5 - Prob. 4CQCh. 5 - An astronaut takes his bathroom scale to the moon...Ch. 5 - A light block of mass m and a heavy block of mass...Ch. 5 - a. Can the normal force on an object be directed...Ch. 5 - A ball is thrown straight up. Taking the drag...Ch. 5 - You are going sledding with your friends, sliding...Ch. 5 - Suppose you are holding a box in front of you and...
Ch. 5 - You are walking up an icy slope. Suddenly your...Ch. 5 - Three objects move through the air as shown in...Ch. 5 - Prob. 13CQCh. 5 - Raindrops can fall at different speeds; some fall...Ch. 5 - An airplane moves through the air at a constant...Ch. 5 - Is it possible for an object to travel in air...Ch. 5 - For Questions 17 through 20, determine the tension...Ch. 5 - For Questions 17 through 20, determine the tension...Ch. 5 - For Questions 17 through 20, determine the tension...Ch. 5 - For Questions 17 through 20, determine the tension...Ch. 5 - In Figure Q5.21, block 2 is moving to the right....Ch. 5 - The wood block in Figure Q5.22 is at rest on a...Ch. 5 - Prob. 23MCQCh. 5 - Prob. 24MCQCh. 5 - Prob. 25MCQCh. 5 - While standing in a low tunnel, you raise your...Ch. 5 - A 5.0 kg dog sits on the floor of an elevator that...Ch. 5 - A 3.0 kg puck slides due east on a horizontal...Ch. 5 - Eric has a mass of 60 kg. He is standing on a...Ch. 5 - Prob. 30MCQCh. 5 - A football player at practice pushes a 60 kg...Ch. 5 - Two football players are pushing a 60 kg blocking...Ch. 5 - Land Rover ads used to claim that their vehicles...Ch. 5 - A truck is traveling at 30 m/s on a slippery road....Ch. 5 - The three ropes in Figure P5.1 are tied to a...Ch. 5 - Prob. 2PCh. 5 - Prob. 3PCh. 5 - A construction crew would like to support a 1000...Ch. 5 - When you bend your knee, the quadriceps muscle is...Ch. 5 - An early submersible craft for deep-sea...Ch. 5 - Prob. 7PCh. 5 - A 65 kg student is walking on a slackline, a...Ch. 5 - Prob. 9PCh. 5 - The forces in Figure P5.10 are acting on a 2.0 kg...Ch. 5 - The forces in Figure P5.11 are acting on a 2.0 kg...Ch. 5 - A horizontal rope is tied to a 50 kg box on...Ch. 5 - Prob. 13PCh. 5 - In a head-on collision, a car stops in 0.10 s from...Ch. 5 - An astronauts weight on earth is 800 N. What is...Ch. 5 - A woman has a mass of 55.0 kg. a. What is her...Ch. 5 - Prob. 17PCh. 5 - a. How much force does an 80 kg astronaut exert on...Ch. 5 - It takes the elevator in a skyscraper 4.0 s to...Ch. 5 - Riders on the Power Tower are launched skyward...Ch. 5 - Zach, whose mass is 80 kg, is in an elevator...Ch. 5 - Prob. 22PCh. 5 - Figure P5.23 shows the velocity graph of a 75 kg...Ch. 5 - Prob. 24PCh. 5 - A 23 kg child goes down a straight slide inclined...Ch. 5 - Prob. 26PCh. 5 - Two workers are sliding a 300 kg crate across the...Ch. 5 - A 4000 kg truck is parked on a 7.0 slope. How big...Ch. 5 - A 1000 kg car traveling at a speed of 40 m/s skids...Ch. 5 - It is friction that provides the force for a car...Ch. 5 - The rolling resistance for steel on steel is quite...Ch. 5 - Prob. 34PCh. 5 - Prob. 35PCh. 5 - Prob. 36PCh. 5 - Prob. 38PCh. 5 - Prob. 40PCh. 5 - A 1000 kg car pushes a 2000 kg truck that has a...Ch. 5 - A 2200 kg truck has put its front bumper against...Ch. 5 - Blocks with masses of 1.0 kg, 2.0 kg, and 3.0 kg...Ch. 5 - Prob. 44PCh. 5 - Prob. 45PCh. 5 - Prob. 46PCh. 5 - Each of 100 identical blocks sitting on a...Ch. 5 - A 500 kg piano is being lowered into position by a...Ch. 5 - Dana has a sports medal suspended by a long ribbon...Ch. 5 - Prob. 51GPCh. 5 - Your forehead can withstand a force of about 6.0...Ch. 5 - A 50 kg box hangs from a rope. What is the tension...Ch. 5 - Prob. 54GPCh. 5 - A 50 kg box hangs from a rope. What is the tension...Ch. 5 - A fisherman has caught a very large, 5.0 kg fish...Ch. 5 - Riders on the Tower of Doom, an amusement park...Ch. 5 - Prob. 58GPCh. 5 - Seat belts and air bags save lives by reducing the...Ch. 5 - Prob. 60GPCh. 5 - A 20,000 kg rocket has a rocket motor that...Ch. 5 - Youve always wondered about the acceleration of...Ch. 5 - Prob. 63GPCh. 5 - An impala is an African antelope capable of a...Ch. 5 - Josh starts his sled at the top of a 3.0-m-high...Ch. 5 - Prob. 67GPCh. 5 - Prob. 68GPCh. 5 - Prob. 69GPCh. 5 - Prob. 70GPCh. 5 - Prob. 71GPCh. 5 - Prob. 72GPCh. 5 - Prob. 73GPCh. 5 - Its possible for a determined group of people to...Ch. 5 - Prob. 75GPCh. 5 - Prob. 77GPCh. 5 - Prob. 79GPCh. 5 - Prob. 80GPCh. 5 - Prob. 82GPCh. 5 - Prob. 83GPCh. 5 - Prob. 84GPCh. 5 - MCAT-Style Passage Problems Sliding on the Ice In...Ch. 5 - MCAT-Style Passage Problems Sliding on the Ice In...Ch. 5 - MCAT-Style Passage Problems Sliding on the Ice In...Ch. 5 - MCAT-Style Passage Problems Sliding on the Ice In...
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- A block of mass 3.00 kg is pushed up against a wall by a force P that makes a 50.0° angle with the horizontal as shown in Figure P5.53. The coefficient of static friction between the block and the wall is 0.250. Determine the possible values for the magnitude of P that allow the block to remain stationary. 50.0° Figure P5.53arrow_forwardFigure P5.36 shows loads hanging from the ceiling of an elevator that is moving at constant velocity. Find the tension in each of the three strands of cord supporting each load.arrow_forwardTwo masses are being pulled up a 30.0 degree incline by a force F parallel to the incline. The acceleration down the incline is 1.00 m/s2 and the velocity is down the incline. The force is applied to a 200 kg mass and a string connects the 200 kg mass to a 150 kg mass. The coefficient of kinetic friction is 0.200. The force F is what? This is the explanation a got, but I don't understand it. Can you explain it please? For force equilibrium, W sin 30 - F - uWcos(30) = Ma 1715 - F - 594.69 = 350; F = 771Narrow_forward
- A setup similar to the one shown in Figure P5.38 is often used in hospitals to support and apply a horizontal traction force to an injured leg. (a) Determine the force of tension in the rope supporting the leg. (b) What is the traction force exerted to the right on the leg? Figure P5.38 70⁰ 8.00 kgarrow_forwardYou want to hang an object from the ceiling of an elevator that has a maximum acceleration of 4.0 m/s^2 . If you hang The object with a fishing line that supports 45 N of force, what is the maximum mess the object can have if the line is not to break? Please answer in kgarrow_forwardE 00 . Two blocks connected by a cord passing over a small, fric- tionless pulley rest on frictionless planes (Fig. P5.90). (a) Which way will the system move when the blocks are released from rest? b) What is the acceleration of the blocks? (c) What is the tension in the cord? Figure P5.90 100 kg 50 kg 30.0° 53.1°arrow_forward
- ou are pushing your friend in his wheelchair. You are both taking his dog, Wrathbone, to the vet. Wrathbone is 5 kg and is sitting in your friend’s lap. You decide to increase the wheelchair’s acceleration to 7 ms2 in order to get up a steep ramp. If your friend has a mass of 46 kg and his wheelchair has a mass of 16 kg. What is the force you are applying?arrow_forward46. In Figure P5.46, the pulleys and Q C the cord are light, all surfaces are frictionless, and the cord does not stretch. (a) How does the acceleration of block 1 compare m1 with the acceleration of block 2? Explain your reasoning. (b) The mass of block 2 is 1.30 kg. Find its acceleration as it depends on the mass m, of block 1. (c) What If? What does the result of part (b) predict if m is very much less than 1.30 kg? (d) What does the result of part (b) predict if m approaches infinity? (e) In this last case, what is the tension in the cord? (f) Could you anticipate the answers to parts (c), (d), and (e) without first doing part (b)? Explain m2 Figure P5.46arrow_forwardA 4.12 N ball needs to be accelerating in the vertical direction at 20 m/s2 to reach its target height. How much force must be exerted in the vertical direction to accomplish this?arrow_forward
- A car accelerates down a hill (Fig. P5.95), going from rest to 30.0 m/s in 6.00 s. A toy inside the car hangs by a string from the car's ceiling. The ball in the figure represents the toy, of mass 0.100 kg. The acceleration is such that the string remains perpendicular to the ceiling. Determine (a) the angle 0 and (b) the tension in the string.arrow_forward42. Two objects are connected by a light string that passes over a frictionless pulley as shown in Figure P5.42. Assume the incline is frictionless and take ml 2.00 kg, 26.00 kg, and 6 - 55.0°. (a) Draw free-body dia- grams of both objecis. Find (b) the magnitude of the accel- eration of the objects, (c) the ten sion in the string, and (d) the speed of each object 2.00 s after Figre P5.42 it is released from rest.arrow_forwardA 78 kg skier moves down a mountatin on a 22 degree slope. Air drag and the wet snow provide a resistive force of 120 N, while they push themselves forward with 30 N. Draw a free body diagram for the skier, with +x and +y axes and angles labeled. What is the magnitude and direction (angle) of the net force? What is the magnitude and direction (angle) of the acceleration?arrow_forward
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