Experiment 1 Newton s First Law of Motion In 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 Cup 1 Washer Deep Container Bowl or Pitcher Water You Must Provide Procedure Part 1 1 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 2 1 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 Reserved 3 Hole 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 Observations Motion Observations a The water went back toward me then went forward b The water rocked back and forth but not hard c When turning right water took diagonal path to the left then went back to the right When turning left water took diagonal path to the right then came back to left side d Water went forward almost out of the container and slushed around Table 2 Observations After Flicking Notecard Off of Cup Trial Observations 1 The notecard flew off but the washed dropped in the cup 2 Notecard flew off washer went into cup 3 Washer dropped in the cup and notecard went flying 4 Same thing happened as before 5 Washer dropped in cup notecard flew off cup Post Lab Questions 1 Explain how your observations of the water and washer demonstrate Newton s law of inertia 2 Draw a free body diagram of your containers of water from the situation in Part 1 Step 4d Draw arrows for the force of gravity the normal force your hand pushing up on the container and the stopping force your hand accelerating the container as you stop What is the direction of the water s acceleration 2014 eScience Labs LLC All Rights Reserved 3 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 2014 eScience Labs LLC All Rights Reserved
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