COLLEGE PHYSICS
2nd Edition
ISBN: 9781711470832
Author: OpenStax
Publisher: XANEDU
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Chapter 9, Problem 9TP
To determine
The reason behind the fact that the torque is integral to the increase in force created by a simple machine.
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Directions: Show your work, answers must use the correct SI units and box your final answers. Be an effective communicator! Handwrite your work and submit all three FRQ answers together to the Unit 4 Exam FRQ Canvas Assignment.
A pulley with an unknown mass has a 0.3 m radius that is initially at rest. The rotational inertia of the pulley is 0.35 mr2. A 10 kg box hangs from a rope that is wrapped around the pulley that is also initially at rest. The box accelerates downward a distance of 10 m and reaches a velocity of 8 m/s. Calculate the mass of the pulley.
Given information for following questions is attached in image. (Answer in part A is also listed as mentioned in question c.)
C. Suppose the pulley has mass mp and radius R. Find the acceleration of m1. Verify that your answers agree with part A if you set mp=0.
Express your answer in terms of some or all of the variables m1, m2, mp, and constant g.
D. Find the tension in the upper portion of the string. Verify that your answers agree with part B if you set mp=0.
Express your answer in terms of some or all of the variables m1, m2, mp, and constant g.
E. Find the tension in the lower portions of the string. Verify that your answers agree with part B if you set mp=0.
Express your answer in terms of some or all of the variables m1, m2, mp, and constant g.
Q7:(Remember show your work and explain your reasoning if your not sure of your answer).
Russian aviator Vsevolod Mikhailovich Abramovich invented the Abramovich Flyer based on the design of the Wright
brothers' first plane. After this first success, Abramovich became obsessed with deep space travel designing a spring
based launcher to fire a probe of mass 60kg from Earth (mass 6.00 x 1024 kg, radius 6.40 x 10 m) into deep space.
Determine the minimum speed to launch this probe into deep space such that it never returns.
Vesc=
Tries 0/8
Determine the compression of the spring, having spring constant 6.80 x 10 N/m, needed to launch this probe using
Abramovich's design.
Chapter 9 Solutions
COLLEGE PHYSICS
Ch. 9 - What can you say about the velocity of a moving...Ch. 9 - Under what conditions can a rotating body be in...Ch. 9 - What three factors affect the torque created by a...Ch. 9 - A wrecking ball is being used to knock down a...Ch. 9 - Mechanics put a length of Pipe over the handle of...Ch. 9 - Prob. 6CQCh. 9 - Explain the need for tall towers on a suspension...Ch. 9 - When visiting some countries, you may see a person...Ch. 9 - Prob. 9CQCh. 9 - Prob. 10CQ
Ch. 9 - Why are the forces exerted on the outside world by...Ch. 9 - Explain why the forces in our joints are several...Ch. 9 - Why are the forces exerted on the outside world by...Ch. 9 - Explain why the forces in our joints are several...Ch. 9 - Certain of dinosaurs were bipedal (walked on two...Ch. 9 - Swimmers and athletes during competition need to...Ch. 9 - If the maximum force the biceps muscle can exert...Ch. 9 - Suppose the biceps muscle was attached through...Ch. 9 - Explain one of the reasons why pregnant women...Ch. 9 - (a) When opening a door, you push on it...Ch. 9 - When tightening a bolt, you push perpendicularly...Ch. 9 - Two children push on opposite sides of a door...Ch. 9 - Use the second condition for equilibrium (net =0 )...Ch. 9 - Repeat the seesaw problem in Example 9.1 with the...Ch. 9 - Prob. 6PECh. 9 - Two children of mass 20.0 kg and 30.0 kg sit...Ch. 9 - Prob. 8PECh. 9 - A person carries a plank of wood 2.00 m long with...Ch. 9 - Prob. 10PECh. 9 - Prob. 11PECh. 9 - Prob. 12PECh. 9 - Prob. 13PECh. 9 - Prob. 14PECh. 9 - Prob. 15PECh. 9 - Prob. 16PECh. 9 - To get up on the roof, a person (mass 70.0 kg)...Ch. 9 - Prob. 18PECh. 9 - Prob. 19PECh. 9 - Suppose you needed to raise a 250-kg mower a...Ch. 9 - Prob. 21PECh. 9 - Prob. 22PECh. 9 - Prob. 23PECh. 9 - Prob. 24PECh. 9 - Prob. 25PECh. 9 - Prob. 26PECh. 9 - Prob. 27PECh. 9 - Prob. 28PECh. 9 - Prob. 29PECh. 9 - Prob. 30PECh. 9 - Prob. 31PECh. 9 - Prob. 32PECh. 9 - Prob. 33PECh. 9 - Prob. 34PECh. 9 - Prob. 35PECh. 9 - Integrated Concepts Suppose we replace the 4.0-kg...Ch. 9 - Prob. 37PECh. 9 - You have just planted a sturdy 2-m-tall palm tree...Ch. 9 - Unreasonable Results Suppose two children are...Ch. 9 - Construct Your Own Problem Consider a method for...Ch. 9 - Prob. 1TPCh. 9 - Prob. 2TPCh. 9 - Prob. 3TPCh. 9 - Prob. 4TPCh. 9 - Prob. 5TPCh. 9 - Prob. 6TPCh. 9 - Prob. 7TPCh. 9 - Prob. 8TPCh. 9 - Prob. 9TPCh. 9 - Prob. 10TPCh. 9 - Prob. 11TP
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- Problem Solving: Show your solutions completely and neatly. 1. Two blocks A and B are lying on a frictionless surface as shown in Figure below, are connected by a cord passing over a small frictionless pulley. a. Draw an FBD for each block. b. What is the tension in the cord? 10 Kg A 30° 45° c. Calculate the mass of block B which slides down the plane that keeps the system moving at a constant speed.arrow_forwardTwo stationary blocks of mass m and M are connected by a massless, frictionless pulley as shown. The coefficient of static friction is us, between block M and the surface. Please show your work and give your answers in terms of the given variables and g. a) What is the force of static friction on block M? b) What is the maximum mass m when the blocks are still stationary? M marrow_forwardA 5 kg sphere moves at 5m/s in the +x direction and hits a 2kg stationary ball at the origin. After the spheres collide, the lighter ball has a final velocity of 3.6m/s directed 49 degrees from the x axis as shown in the image below. 1. Figure out the speed (v') and direction (theta) of the heavier ball after the collision 2. Is the collision elastic or inelastic? Explain your answer in 3 sentences or less. 5 kg 5 m/s 2 kg To 49° 3.6 m/s Iarrow_forward
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- Please show formulas you use to resolve the problem. Please be clear on your answer. Attached is the formula and all you need to resolve the problem. Please show all your wok and formulas for the step you use to resolve problemarrow_forwardDisk P (inertia 0.41 kg ) moves at an unknown velocity across a low-friction horizontal surface and collides with disk Q (inertia 0.75 kg ), which is initially at rest. After the collision, the two (now slightly dented) disks move apart without spinning. Velocity information is provided in the initial and final top-view diagrams in the (Figure 1). Part A What was the initial velocity of disk P? Express your answer with the appropriate units. ? Value Units Submit Previous Answers Request Answer X Incorrect; Try Again; 7 attempts remaining Part B What fraction of the initial kinetic energy is converted during the collision? Πν ΑΣφ Kị-K _ Figure < 1 of 1 Submit Request Answer initial final < Return to Assignment Provide Feedback 1.4 m/s 20° Qat rest /50° (P not shown) 0.96 m/sarrow_forwardTEXT ANSWER In order to make a video for physics class, Sergei used concrete blocks to create static equilibrium to balance himself on a board. Sergei planned to sit 2.0 m from the pivot point and place the blocks 4.0 m from the pivot point on the opposite side. Sergei's mass was 100.0 kg. If each concrete block had a mass of 10 kg, how many blocks did Sergei need to place the system in static equilibrium? Show your work.arrow_forward
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