# TAMU PHYS 1402 - Unit 3 Lab Write Up (10 pages)

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## Unit 3 Lab Write Up

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## Unit 3 Lab Write Up

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Pages:
10
School:
Texas A&M University
Course:
Phys 1402 - COLLEGE PHYSICS 2
##### COLLEGE PHYSICS 2 Documents
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Newton s Laws of Motion Isaac Newton s Three Laws of Motion May 20 2018 Newton s Laws of Motion Abstract Isaac Newton s three laws of motion dictate the connection between acceleration and forces The three laws are applied in many ways in everyday life Most of the lab was centered around the Laws of Motion The forces that act around the world each day control the movements made by humans each day A force can be defined as any impact that causes an object to go through some form of change The change can focuses on the movements an object makes and the direction it goes in after the force has been applied This lab informs the students on how an object s acceleration is directly proportional to any new force that has acted upon the object Newton s Laws of Motion Introduction The laws of physics were discovered centuries ago Isaac Newton is know for his Laws of Motion Newton spent years in isolation formulating ideas about math and physics He want to learn what object that orbit the Earth and those that fall to the ground have in common Newton created quantitative explanations for the motion of falling objects orbiting objects and pulley systems His ideas were broken down into three basic laws Newton s first law states that an object at rest will remain at rest and an object at motion will remain in motion until acted on by an outside force This can be described as inertia If there is no net force to act on the object the object would keep the same constant velocity If the object has a velocity of 0 then the object is at rest and will remain at rest The velocity will only change if the object is acted on by an outside force Newton s second law describes how an object s velocity changes when acted on by an outside force This law describes force as an equal change in momentum per time This law also states that an object with a constant mass can be multiplied by the object s acceleration to find the force acting on the object Newton s second law states that for every action there is an equal and opposite reaction If one object exerts force on another the second object will exert an equal force in the opposite direction on the first object Newton s Laws of Motion First Experiment Hypothesis The water in the lab will move toward the student in the first position move back in forth in the next splash in the opposite direction in the third and splash forward in the final position The washer will fall in the cup each time Second Experiment Hypothesis The string between the spring scale and the mass will cause greater force The pulley will cause more force Third Experiment Hypothesis When a washer is added to M2 and taken from M1 M2 will fall faster than it did when there were only 8 washers on M2 and 7 on M1 Methods For part one of experiment one a container was filled with about four inches of water An open outside space was used to walk around with the container of water in a students hands Four activities were performed during this time These activities included leaving the water at rest on a tabletop then quickly accelerating it walking with the water at a constant speed in a straight line for 15 feet walking in a straight line at a constant speed then making fast left and right turns and walking in in a straight line then stoping abruptly The observations were recorded in Table 1 For part two of experiment one a 3 x 5 notecard was over the opening of a styrofoam cup Then a washer was placed in the middle of the 3 x 5 notecard The student held the styrofoam cup with their non dominant hand then flicked the notecard with their non dominant hand so the card was moved off of the cup The observations were recorded in Table 2 This was repeated four more times for a total of five trials For part one of experiment two the 5 N and 10 N spring scales were calibrated The handle of the 5 N spring scale was hooked to the hook of the 10 N spring scale The 10 N spring scale was held stationary and the hook of the 5 N spring scale was pulled until the force read 5 N The force on the 10 N spring scale was recorded in Table 3 This was repeated with the 10 N spring scale hanging from the 5 N spring scale The force was recorded in Table 3 For part two of experiment 2 the 0 5 kg mass was held in the air using the 10 N spring scale The force on the 10 N spring scale was recorded in Table 4 One end of a 30 cm long string was tied to the 0 5 kg mass The other end of the string was tied to the 10 N spring scale The mass was suspended in the air by lifting the 10 N spring scale The force on the 10 N spring scale was recorded in Table 4 The string on Newton s Laws of Motion the 0 5 kg mass was untied and tied to the hook of the 5 N spring scale The 0 5 kg mass was hooked on the handle of the 5 N spring scale This mass scales and string were suspended in the air by holding the handle of the 10 N spring scale These values were recorded in Table 4 Next the pulley was secured on a table top by tying a string to one of the hooks Masking tape was used to secure the string to the table so the pulley would lay flat against the side of the table The mass setup from the previous step was used here again The string was placed over the pulley after unhooking one of the spring scales Then the string was put through the pulley and then reattached to the hook of the spring scale it was removed from The 10 N spring scale was held in place so the scales and the mass were stationary The values for both spring scales were recorded in Table 4 For part one of experiment three the pulley was supported so the objects that hang from it could descend to the floor This was done by tying a short piece of string to one of the pulley hooks A piece of masking tape was used to keep the string in place A piece of string was thread through the pulley so the washer could be attached to both ends of the string The string was long enough for one set of washers to touch the ground while the others were set close to the pulley The 5 N spring scale was used to weigh the set of 15 washers The total mass was divided by 15 to find the average mass of 1 washer The total mass of the washers and …

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