Materials to gather for this lab: Tape measurer, or ruler or yardstick String Stop watch (cellphone?) 3 objects with kno

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Materials To Gather For This Lab Tape Measurer Or Ruler Or Yardstick String Stop Watch Cellphone 3 Objects With Kno 1 (60.76 KiB) Viewed 9 times

Materials to gather for this lab: Tape measurer, or ruler or yardstick String Stop watch (cellphone?) 3 objects with known masses ( different sized cans, bags, etc. with known weights.) Procedure: 1. Attach the string end to a high place with room under it 2. Attach an known mass to the other end of the string 3. Measure the length of the string to the center of the hanging mass This is H-the hypotenuse 4. Get the mass swinging in a rough circle 5. Get a rough measurement of the radius of the swing R 6. Get the velocity of the object by knowing the circumference of the rotation and using the stop watch get its period of rotation. v=s/t. Now visualize a right triangle whose hypotenuse is the string length and whose x value is the radius of the circle of rotation. Got that? Now with objects on strings free to move, all the sides of the right triangles will be proportional to the Forces on those triangle sides. Thus the Hypotenuse is the vector total of the X and Y forces. The Y force is Fg=m*g, the X force is Fc=m*v^2/R See sketches below. FoRcE DISTANCE SKETCH SKETCH H STRING Levent Fg 27 F c 2 = ForAL Fg Fc R 9=9,8 R in MATERS win mis Egang Fe= moz R Using the length relationships of the triangle sides to the forces relationships of those sides find the Centripetal forces on your 3 objects. Then compare that force to the calculation of m*v^2/R. How close did they come out. Explain why there may be differences. Mass Fc from the geometry Fc from the algebra Mass 1 N N Mass 2 N N Mass 3 N