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TAMU PHYS 1401 - Lab 3 procedue and data_Julia Graham

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Experiment 1: Newton's First Law of MotionIn this experiment, you perform a series of motions and analyze the results to explain Newton’s First Law of Motion.Materials(1) 3" by 5" Notecard(1) 8 oz. Styrofoam® Cup1 Washer*Deep Container (Bowl or Pitcher) *Water*You Must ProvideProcedurePart 11. Fill the container with about four inches of water. 2. Find an open space outside to walk around in with the container of water in your hands. 3. Perform the following activities and record your observations of each motion in Table 1: a. Start with the water at rest (e.g., on top of a table). Grab the container and quickly accelerate it. b. Walk with constant speed in a straight line for 15 feet. c. After walking a straight line at constant speed, make an abrupt right-hand turn. Repeat with a left-hand turn. d. After walking a straight line at constant speed, stop abruptly. Part 21. Place a 3 x 5 notecard on top of a Styrofoam® cup. 2. Place a washer on the middle of the 3 x 5 notecard. © 2014 eScience Labs, LLC.All Rights Reserved3. Hold the Styrofoam® cup with your non-dominant hand and flick the notecard with your dominant hands (the hand you write with) so it moves off of the Styrofoam® cup. Record your observations in Table 2. 4. Repeat Steps 1- 3 four times for a total of five trials. Table 1: Motion of Water ObservationsMotion Observationsa Water sloshed backwardsb Water moved minimallyc Water sloshed in opposite direction of movementd Water sloshed forwards Table 2: Observations After Flicking Notecard Off of CupTrial Observations1 Notecard moved but was not knocked completely off2 Notecard fell off and washer went in cup3 Notecard fell off and washer went in cup4 Notecard did not fall off but washer did5 Notecard fell off and washer fell into the cupPost-Lab Questions1. Explain how your observations of the water and washer demonstrate Newton’s law ofinertia.The washer fell into the cup because the force was not exerted on the washer and so it remained still.© 2014 eScience Labs, LLC.All Rights Reserved2. Can you think of any instances when you are driving or riding a car that are similar to this experiment? Describe two instances where you feel forces in a car in terms of inertia.When there is a sudden stop in a car all people and objects are thrown forward, hopefullycaught by their seatbelt. Another instant is when a car makes a sharp turn you will be thrown in the opposite direction of the movement. This is also a result of inertia because your body does not have the force directly applied to it as the car does. Your body receives the motion from the car as it pulls you along. Experiment 2: Newton's Third Law and Force Pairs© 2014 eScience Labs, LLC.All Rights ReservedIn this experiment, you will investigate Newton's Third Law of Motion by observing forces exerted on objects.Materials5 N Spring Scale10 N Spring Scale(2) 30 cm Pieces of String 0.5 kg MassPulleyProcedurePart 11. Make sure the spring scales are calibrated using the standard masses. 2. Hook the handle of the 5 N spring scale to the hook of the 10 N spring scale. 3. Holding the 10 N spring scale stationary, pull the hook of the 5 N spring scale until theforce reads 5 N on it. Record the force on the 10 N spring scale in Table 3. 4. Repeat Steps 2 and 3 with the 10 N spring scale hanging from the 5 N spring scale. Record the force on the 5 N spring scale in Table 3.Part 21. Suspend the 0.5 kg mass in the air using the 10 N spring scale. Record the force on the 10 N spring scale in Table 4. 2. Tie one end of one of the pieces of string to the 0.5 kg mass and the other end to the hook of the 10 N spring scale. 3. Suspend the mass in the air by lifting the 10 N spring scale. Record the force on the 10N spring scale in Table 4. Table 3: Force on Stationary Springs© 2014 eScience Labs, LLC.All Rights ReservedForce on Stationary 10 N Spring Scale (N)5.6N Force on Stationary 5N Spring Scale (N)5N4. Untie the end of the string attached to the 0.5 kgmass and tie it to the hook of the 5 N spring scale. 5. Hook the 0.5 kg mass to the handle of the 5 N springscale. Suspend the mass, scales, and string by holdingthe handle of the 10 N spring scale. Record the valuesof the spring scales in Table 4. 6. Secure the pulley on a table top by tying string to oneof the hooks. Then, use masking tape to secure the string to a table top so that the hook on the top of the pulley lays flat on the side of the table top (Figure 5). 7. Using the mass setup from Step 5, place the string over the pulley by unhooking one of the spring scales, feeding the string through the pulley and reattaching the string tothe hook of the spring scale (Figure 6). 8. Hold the 10 N spring scale in place so that the scales and mass are stationary. Record the values for both spring scales in Table 4. © 2014 eScience Labs, LLC.All Rights Reserved Figure 5: Pulley Set UpFigure 6: Step 7 reference(string length and mass mayvary).Table 4: Spring Scale Force DataSuspension Set UpForce (N) on 10 NSpring ScaleForce (N) on 5 NSpring Scale0.5 kg Mass on 10 N Spring Scale 4.9 3.90.5 kg Mass with String on 10 N Spring Scale 5.0 0.5 kg mass, string and 5 N Spring Scale on 10 Nspring scale5.0 3.10.5 kg mass, string and 5 N Spring Scale on 10 Nspring scale on Pulley 5.3 4.9© 2014 eScience Labs, LLC.All Rights ReservedPost-Lab Questions1. How did the magnitude of the forces on both spring scales compare after you moved the 10 N spring scale?The 10N scale has a less accurate reading but was pretty comparable to the 5N readings.2. How did the magnitude of the forces on both spring scales compare after you move the 5 N spring scale?This did not have much effect on the readings, it slightly lowered it.3. Use Newton’s 3rd Law to explain your observations in Questions 1 and 2.Because for every reaction there is an equal and opposite reaction when you move one of the scales all parts are affected. 4. Compare the force on the 10 N spring scale when it was directly attached to the 0.5 kg mass and when there was a string between them.It slightly lowered the reading because some of the tension came out in the string that attached the two scales.5. Compare the force on the two spring scales in Steps 5 and 6. What can you conclude about the tension in a string?The tension in the string stayed constant and decreased the readings in the scales..Experiment 3: Newton's Second Law and the Atwood Machine© 2014 eScience Labs, LLC.All Rights ReservedThis experiment will


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TAMU PHYS 1401 - Lab 3 procedue and data_Julia Graham

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