Grade 11 Dynamics Lab Report Friction SPH3U1-02 Williams. C. By----James & Hao Feng & Henry Zhang Purpose: By measuring the friction and μ of a container and change different variables including mass‚ surface and gradient‚ get causes of the change of friction and μ. Materials: A container Three Pen bag in different mass A rough wood board A clean desk Rulers Thrust meter. Steps Prepare
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experiment‚ the very first step is to weigh the plain block and object used on top of the wooden block in grams and Newton’s‚ as this information will be useful throughout the lab. Next place the ramp board horizontally on a table to measure the friction of the block and the weight of the soft drink can set on top of the wooden black by connecting the blocks hook to the spring scale. Meanwhile set the block and its weight on the board with its largest surfaces in contact with the surface of the board
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Kinetic Friction Experiment #13 Joe Solution E01234567 Partner- Jane Answers PHY 221 Lab Instructor- Nathaniel Franklin Wednesday‚ 11 AM-1 PM Lecture Instructor – Dr. Jacobs Abstract The purpose of this experiment was to examine kinetic friction and what factors affect it. We pulled a wood block across a surface to determine whether the surface area of the block or the type of surface affects friction. The surface area did not appear to affect friction‚ since there was a small percent difference
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direction to that in part (a)? 58. A boy pulls a box of mass 30 kg with a force of 25 N in the direction shown in Fig. 4.33. (a) Ignoring friction‚ what is the acceleration of the box? (b) What is the normal force exerted on the box by the ground? Figure 4.33 Pulling a box. See Exercises 58 and 89. 89. In Exercise 58 and Fig. 4.33‚ if the coefficient of kinetic friction between the box and the surface is 0.03 (waxed wood box on snow)‚ what is the acceleration of the box? 59. A girl pushes a 25-kg
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SUMMARY OF FRICTION The maximum force of static friction that exists between two surfaces is proportional to the normal force and mostly independent of area of contact. This situation is shown here: N = the total normal force (force perpendicular to the horizontal surface) which is essentially the weight of the object. The coefficient in that equation is called the coeffecient of static friction and that depends on the material: When the object is actually moving‚ the friction is said to be kinetic
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Activity 4. Friction is the resistance to motion of one object moving relative to another. [1] There are three laws of motion known today. These laws are: (A) frictional force being independent of the area of contact‚ (B) frictional force being proportional to the load‚ and (C) frictional force being independent of the speed of movement. [2] Friction may be subdivided into two types namely Static Friction and Kinetic Friction. Static force of friction is the force of friction between two objects
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What 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
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------------------------------------------------- “FRICTION” I. Learning Objectives At the end of the lesson‚ 95% of the fourth year students should be able to: 1. define friction; 2. identify the types of friction; 3. draw the free body diagram of forces in a given problem; and 4. determine the advantages and disadvantages of frictional force in our daily life. II. Learning Content A. Subject matter Friction 1. Content outline Definition of terms Types of friction Construction of free-body
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of the origin of the yo-yo but many say China. Others say that ancient Greeks as far back as 2‚500 years used yo-yos for entertainment. The motion and the process of playing with a yo-yo incorporates many concepts in physics of momentum‚ energy‚ friction‚ etc. With simply a spool and a bit of string a yo-yo is a fantastic model of physics hard at work. In the first versions of the yo-yo‚ the string was tied directly to the spool‚ which made the yo-yo snap back up as soon as it was fully extended
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you are right - I just don’t know! 1. Tension‚ Weight‚ Friction: You are taking advantage of an early snow to go sledding. After a long afternoon of going up and down hills with your sled‚ you decide it is time to go home. You are thankful that you can pull your sled without climbing any more hills. As you are walking home‚ dragging the sled behind you by a rope fastened to the front of the sled‚ you wonder what the coefficient of friction of the snow on the sled is. You estimate that you are
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