Lab Worksheet

# Lab Worksheet - Station One: At home: At home: At home: At...

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Station One: Materials: CBL with photogate, pulley, cart (mass m 1 = 222 g), masses to put on cart ( m 2 ), string, masses to put on string ( m 3 ). . Directions: 1) Put m 2 = 700 grams on the cart. Use hanging mass m 3 = 50 g. Use the EASYDATA program to monitor the motion of the cart. 2) Copy speed vs. position data (ignore acceleration and time). Calculate the square of the speed. 3) Repeat the trial with mass m 2 = 550 g on the cart and hanging mass m 3 = 200 g. Copy only the final speed and the final position of the cart. At home: 4) Tabulate the data in step #2 and graph the square of the speed vs. position. Position is the independent variable. At home: 5) Determine the square of the initial speed of the cart from the graph. If your table was sloped, this number may be negative. At home: 6) For data graphed in step #4 (including at x = 0 and t = 0), calculate the quantity 2 1 2 3 1 () 2 m m m v . This is the kinetic energy, K , of the system. Also calculate the change in kinetic energy, K = K K o , where K o is the initial kinetic energy (at x = 0 and t = 0). Finally, calculate the quantity m 3 gx , which is the work, W , done on the system. This process is easy if you use a spreadsheet like Microsoft Excel. At home: 7) Tabulate K , K , and W . Graph K vs. W . Because work depends on position, work is the independent variable. Station Two: Materials: Spring, various small masses, rod connected to table, tape/stickers, meter stick Directions: 1) Hang your spring from the rod and measure its length, x o (the distance from the bottom of the rod to the bottom of the spring) 2) Hang a 100-g mass from the spring, wait until the mass comes to rest, and then measure the new length at rest, x 1 . Calculate the stretch of the spring at rest, x 1 = x 1 - x o . Repeat with 200, 300, 400, 500, and 600-g masses.

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## This note was uploaded on 02/10/2012 for the course PHYS 123 taught by Professor Phys123 during the Spring '10 term at Buena Vista.

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Lab Worksheet - Station One: At home: At home: At home: At...

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