Lab Manual 2005

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$Sample Math Placement Test$

$Y:\How to solve 2 dimension relative velocity problems.wpd$

7. Given that two objects of equal mass and surface texture but different contact areas, aresliding across the same surface with constant velocity, which is true:a. The block with greater contact area feels a larger frictional force.b. The block with smaller contact are feels a greater frictional forcec. Both block feel equal fictional force(Justify your choice. Try examining your block using different surface areas.)8. A 3.2 kg block is allowed to slide down a rough but perfectly vertical surface. What is thefrictional force on the block? Explain?9. How much force is required to accelerate a 30 kg block, at 2.5 m/s 2 , along your surface,when it is horizontal? Include a semi scale FBD and VCD.10. What is the frictional force experienced by a 15.0 kg block sliding on your horizontalsurface?Conclusions:Briefly sum up the results of this lab.a. What factors govern the nature of sliding friction?b. What factors determine the magnitude of friction? What ones do not?c. State differences in static and kinetic friction.d. Discuss any sources of error which may have occurred.- 36 -
Circular MotionSituation: Consider an object like a rubber ball tied to a piece of string being swung in ahorizontal circular path at a constant speed.Is this type of motion natural? That is, if the string broke would the ball continue in itscircular path?What is the string doing to the ball that causes it to move the way it does?Predict how changing the ball’s mass will affect the tension in the string?Predict how changing its speed will affect the tension?Predict how changing the radius of the path will affect the tension?Theory: Objects moving in a circular path require a force, known as the centripetal force,to keep the object moving along that path. Centripetal force is a center seeking force. Themagnitude of the centripetal force is affected by the object’s speed, mass, and the radiusof the circle in which the object is travelling.Purpose: We would like to develop a mathematical model that shows the effect of theobjects speed, the radius of the path, and the mass of the object on the amount of forcerequired to cause it to move in a horizontal circular path.Materials:MPLI, turntable, Force sensor, various masses, and string.Procedure: To develop this model we have designed a turntable that allows you to record theforce while varying the velocity, radius, and mass of the object. However, to successfullydetermine the relationship we must examine the effect that each variable has on the forcewhile the other variables remain constant. Therefore, we have divided the lab into threeparts, where different groups will perform different parts and the information will beshared to obtain the final result.- 37 -
Page 1 and 2: Data AnalysisSituation: This is an
Page 3 and 4: Part 2 (Use Data Set 2)1. Identify
Page 5 and 6: Kinematics(ULV)Situation: Consider
Page 7 and 8: 7. Calculate the area under the vel
Page 9 and 10: Kinematics(ULA)Situation: Consider
Page 11 and 12: 7. What does the area represent?8.
Page 13 and 14: Projectile SimulationSituation: Pro
Page 15 and 16: DATADot # Time (s) Horizontalx (m)0
Page 17 and 18: 10. What is the velocity at 2.0s ?
Page 19 and 20: Relative Velocity SimulationSituati
Page 21 and 22: → It is also convenient to have v
Page 23 and 24: 4. Considering delta notation, dete
Page 25 and 26: Analysis:1. What does the slope of
Page 27 and 28: Constant Net Force ModelSituation:
Page 29 and 30: Part 1: Vary the force applied whil
Page 31 and 32: 4. According to 3b what are the uni
Page 34 and 35: Materials:Purpose:A force sensor, w
Page 38 and 39: Part 1: Varying the mass.• Enter
Page 40 and 41: Part 3: Varying the radius.• Ente
Page 42 and 43: 1. A 25.0 kg child on a merry-go-ro
Page 44 and 45: These concepts are merely an outgro
Page 46 and 47: Part 2Procedure: Collisions between
Page 48 and 49: Part 3Procedure: Referring to the c
Page 50 and 51: 2. As a ball falls toward earth, it
Page 52 and 53: →Run the experiment to collect da
Page 54 and 55: → Verify Conservation of Energy w
Page 56 and 57: →Locate, on the track, each posit
Page 58 and 59: • We need to provide a “control
Page 60 and 61: 3. Can you rewrite the equation fro
Page 62: - 62 -

Lab Manual 2005

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