2. The follower axis passes by 20mm offset from the cam axis Draw also the velocity & acceleration diagrams when the speed of rotation of cam is 100rpm. GIVEN DATA: Roller follower; Ɵₒ=150ᴼ; Dwell=30ᴼ Ɵᵣ=150ᴼ; Dwell=30ᴼ; Base radius r=30mm Roller radius=10mm; stroke=50mm; N=100rpm Motion: Simple Harmonic Motion. To Find: i) To draw the cam profile ii) Velocity and acceleration 3.) A cam with flat faced follower has the following specifications
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opens‚ click on ‘Show Both’ for Velocity and Acceleration at the top of the page. Now click and drag the red ball around the screen. Make 3 observations about the blue and green arrows (also called vectors) as you drag the ball around. 1. The green line points in the direction that the ball is going to go 2. The blue line changes the direction it points. 3. The blue line also changes size depending on the speed 2) Which color vector (arrow) represents velocity and which one represents acceleration
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Free fall and the acceleration due to gravity Problem/Question: How do you measure the acceleration of a falling object? Hypothesis: by measuring velocities of a falling ball then applying the data into equations numerous times‚ the results should approach to the acceleration. Variables: A: Independent Velocity B:Dependant Acceleration C:Constant Distance (photo gates) Materials: Photo gates‚ Clay ball‚ Photo gates machine.
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b) Average velocity for the first 2 seconds after the ball was dropped= h2-h02-0 = 430.4-4502-0 = -19.62 = -9.8 m/s c) Average velocity for the following time intervals: i. 1≤t≤4 = h4-h14-1 = 371.6-445.14-1 = -73.53 = -24.5 m/s ii. 1≤t≤2 = h2-h12-1 = 430.4-445.12-1 = -14.71 = -14.7 m/s iii. 1≤t≤1.5 = h1.5-h11.5-1 = h1.5=-4.91.52+450-445.11.5-1 = 438.975-445.11.5-1 = -6.1250.5 = -12.25 m/s = -12.3 m/s d) Instantaneous velocity at t= 1 second
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CHAPTER 1: Introduction‚ Measurement‚ Estimating Answers to Questions 1. (a) Fundamental standards should be accessible‚ invariable‚ indestructible‚ and reproducible. A particular person’s foot would not be very accessible‚ since the person could not be at more than one place at a time. The standard would be somewhat invariable if the person were an adult‚ but even then‚ due to swelling or injury‚ the length of the standard foot could change. The standard would not be indestructible – the foot would
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When something spins it undergoes “rotational motion”. When something spins around a single point it is called “circular motion”. B. We measure how fast something spins not in m/s (different points on the object are spinning at different velocities) but by measuring the angle described in a given time period. C. Angles can be measured in radians (rad) 1. The radian is the ratio of the arc length (s) to the radius (r) of a circle (insert fig. 7-1 here)
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The reaction time is the amount of time required to sense astimulus‚ analyze its meaning‚ and respond. Acceleration is the rate of change of velocity. Velocity is speed with direction. Displacement is the moving of something from its place or position. Free fall acceleration is when there is no air resistance affecting an object. equation for reaction time: t= 2Δx g constant acceleration equation: Δx = v0 t+ 12 at 2 Velocity:
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spring (spring with a higher spring constant k) is used in the experiment then the frequency and centripetal force will both increase. If the spring constant increases‚ the plumb bob will have to rotate at higher velocity to become perpendicular to the horizontal shaft. A higher velocity means a higher frequency since the plumb bob is moving faster and is completing each rotation in less time than before. The centripetal force will be higher because the spring requires more force to cover less distance
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B A A C D 11. If 5m/s and 10m/s are the velocities of a body having a uniform acceleration in some time interval‚ what will be its average velocity? 12. A train travels from
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Old Dominion University PHYS 111N Experiment 10 Harmonic Motion Submitted by: Lab Partner: Lab Instructor: Introduction In this experiment we will investigate the simple harmonic motion of an object suspended by a spring that oscillates on a vertical plane and in a separate experiment was examine oscillations on a horizontal plane. In simple harmonic motion‚ the displacement from the equilibrium position is directly proportional to the force. The force generated is always directed toward
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