is the person’s apparent weight? (Use g = 9.8 m/s2.) A) 900 N B) 760 N C) 620 N D) 960 N Answer: A Var: 35 4) A 80 N force is needed to slide a 50.0 kg box across a flat surface at a constant velocity. What is the coefficient of kinetic friction between the box and the floor? (Use g = 9.8 m/s2.) A) 0.16 B) 0.13 C) 0.15 D) 0.18 Answer: A Var: 50+ 5) A piano mover raises a 100 kg piano at a constant rate using a frictionless pulley system‚ as shown in the figure. With roughly what
Premium Friction Force Mass
Questions What are the two ways that friction affected the performance of your vehicle? Friction affected my vehicle by either not pushing it far enough‚ or pushing it very far. The friction of the ground would also stop my vehicle from going farther then it could’ve. My car also needed a bit of momentum to start so the friction did not help my care move at all. What problems related to friction did you encounter and how did you solve them? The friction did not help my car move. My car needed
Premium Friction Classical mechanics Force
2009 Kinetic Friction Experiment #13 Joe Solution E00123456 Partner - Jane Answers PHY 221 Lab Instructor – Chuck Borener Thursday‚ 11 AM – 1 PM Lecture Instructor – Dr. Jacobs Abstract In this experiment‚ we test factors which effect friction. We pulled a wood block across a surface to determine whether the surface area of the block or the type of surface effects friction. We found that the surface area of the block did not change the coefficient of kinetic friction‚ while the types of
Free Force Friction Mass
Journal of Manufacturing Systems Vol. 16/No. 5 1997 A Systems Model and Simulation of the Vibratory Bowl Feeder Gary P. Maul and M. Brian Thomas‚ The Ohio State University‚ Columbus‚ Ohio ture of a vibratory bowl feeder is the maximum speed at which it can convey parts. Though not the first to research vibratory feeders‚ he worked independently of other investigators to develop a basic theory of operation. He defined the essential parameters for bowl analysis and with these defined the
Premium Friction Classical mechanics Force
Introduction Super-hydrophobic surfaces‚ as well as‚ low adhesion and friction are desirable for various industrial applications. Hydrophobic (water-repellent) surfaces can be constructed either by using low surface energy materials or by chemically treating surfaces with materials such as polytretafluoroethylene‚ silicon‚ or wax. Another technique that can be used to increase the hydrophobic properties of a hydrophobic surface is to increase the surface area by increasing surface roughness. If
Premium Friction Materials science Tribology
block. 4. Place the mode of friction (felt‚ aluminum foil‚ carpet‚ or sandpaper) on top of the incline plane. 5. Place the wooden block on top of the incline plane on the side closest to the floor. 6. Connect the spring scale to the wooden block and steadily drag the block up the incline plane. 7. Record the initial force and the continuous force of the wooden block in Newtons. 8. Change the mode of friction and repeat steps 3-5 over again. Data Table- Friction Material Sandpaper Aluminum
Free Force Friction Mass
The St Venant Equations Dr P A Sleigh Dr I M Goodwill School of Civil Engineering‚ University of Leeds March 2000 1 THE DERIVATION OF THE CONTINUITY EQUATION ...........................................................................................1 2 THE DERIVATION OF THE DYNAMIC OR MOMENTUM EQUATION. ...............................................................2 3 THE SOLUTION OF THE ST VENANT EQUATIONS ...................................................................
Premium Numerical analysis Elementary algebra Polynomial
FIRST MID-QUARTER ASSESSMENT IN SCIENCE (8th Grade – Candid Puffin) Name: _____________________ Date: ________________ I. KNOWLEDGE A. Identification. Identify the law/concept that explains each of the given phenomena. Write only the letter of the correct answer on the space provided. A – Law of Inertia B – Law of Acceleration C – Law of Interaction _____ 1. Recoil of a gun when fired _____ 2. Two men find a car harder to push than a tricycle _____ 3. A body moves backward
Premium Classical mechanics Force Mass
kg from the floor to a height of 1.98 m. How much work does he do? W=FΔd=Eg Eg=mgΔh m=254 kg Δh=1.98 m Eg=(254)(9.8)(1.98) Eg=49528.62 J W=49528.62 J A child drags a 20-kg box across a lawn for 10 m and along a sidewalk for 30 m the coefficient of friction is 0.25 for the first part of the trip and 0.55 for the second. If the child always pulls horizontally‚ how much work does the child do on the box? WTotal=F1Δd1+F2Δd2 F1=FN=μmg Δd1=10 m m=20 kg μ=0.25 W1=(0.25)(20)(9.8)(10)
Premium Force Potential energy Energy
PHYS 1401 College Physics I Test 2 Page 1 of 6 Houston Community College System PHYS 1401 Test # 2 PHYS 1401 College Physics I Test 2 Page 2 of 6 Name ______________________________________________________ Date ____________ PHYSICS 1401. Test 1 Chapters 3‚ 4 and 5 _____________________________________________________________________________ INSTRUCTIONS: Answer all questions from Section I (2 points per question). And Solve at least four problems from Section II (20 points
Free Force Classical mechanics Friction