Lab_Manual_02

# Lab_Manual_02 - Lab 2 Investigating Distance and Speed...

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Lab 2 Investigating Distance and Speed; Displacement and Velocity Introduction : This investigation is designed to help you learn about distance and speed, and distinguish it from displacement and velocity. Distance is the length of the path traveled by an object. Speed depends on how fast the distance is covered. Distance covered x Average speed = = Time taken t In this investigation you will be using a ticker timer and paper tape to measure the speed of a trolley moving on a frictionless track. The ticker timer ticks 40 times a second when set on high, producing 40 dots per second on the paper tape that is moved through the timer. If you turn on the ticker timer and run a length of paper through it, it will look like the diagram below. ____________________________________________________________ … . . . . . . . . . . . . . . . . . . . . ____________________________________________________________ The distance between any two consecutive dots is the distance traveled in 1 0.025 40 s = Activity 1: Cut about 1.0 m length of tape and slide one end of it into the timer. Turn the timer on and pull it so that the entire tape runs through the timer. Cut off the first few dots and then count 10 dots and cut off a length containing that 10 dots. Cut off at the 10th dot so that you have 10 intervals on the paper. Cut off two more pieces that contains 10 intervals. Use your ruler to measure the length of these strips on your computer screen. Since you will be measuring the lengths on the computer screen, this measured length needs to be converted to the actual length. In order to do this, you need to obtain a conversion factor . I will give you the actual length of one strip. Obtain your conversion factor as:

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Actual length Conversion factor Measured length = Actual length measured by the instructor = ………. . m The length of the strip measured on the computer screen = …………….m Conversion factor = ……… Now use the conversion factor to obtain the actual lengths of each strip. Length of strip 1 = ……. . m Length of strip 2 = ……. . m Length of strip 3 = ……. . m QUESTION: Why do you think it necessary to cut off the first few dots? ……………………………………………………………………………… ………………………………………………………………………………. QUESTION: If 40 dots are made in one second, what is the time taken to mark 10 dots?. Record this time as t. ………………………………………………………………………………. . QUESTION: If the length of strip 1 is L 1 , then the paper travels a distance x = L 1 in time t. What is the speed of motion of this strip? ………………………………………………………………………………. QUESTION: What is the speed of strip 2? ………………………………………………………………………………. QUESTION: What is the speed of motion of strip 3?
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## This note was uploaded on 05/01/2011 for the course PHY 2048 taught by Professor George during the Fall '10 term at Edison State College.

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Lab_Manual_02 - Lab 2 Investigating Distance and Speed...

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