Obtain the mulli wiredmcmane between word "reverse Thy will need to pike weight ( found in the bej en it to prevere sliding. Cus a piece of string approximately 60 em long. Make a loop if each end of the string Place was end of he end of the loop on the book of a wood block. Place the other end of the boop over the edge is pulley curnested to the edge of the wele. Place the block on one of the surfaces. Begin by hanging a 10 gram mass from the koop that i loop that is dangling. Does it cause the Wock to slide ? Determine the maximum amount of weight that can be bung from the string without causing the block to slide. This hanging weight is equal to the static force friction aturem the block and surface it is on. (Remember weight is a force ] (Lock for DATA PATTERNS) How to calculate weight weight - hanging mass (in kg) x 9.8 m] Example: What does a 33.32 gram mass weigh? First convert from grams to kg. Miss - 13 31 grams - 0.03132 bg. weight = 0.0331 2 9.8 - 03 3 N. Perform the experiment again but this time place a moos cas indicated on the table belowb on the wood block. Mass of wood block 144-14 cash Drums kg. Weight of wood block = batts N Weight of word Rubber and block + weight of Cardboard /wood Sandpiper wood Cork Wood Hanging weight additional mash I Longing weight | Hanging waphil Hanging weight ple chan hi PAR chan INA Nie chain NI Frictional fores IN) No addiuncial nash Frictional force of . WIL #20 grand en word black Frictional fares IN) 1-40 groans on word Frictional force (N) bkick Frictional force (NI 140 pranis on wood Hack Frictional farce IND + 107 grams on word huck Important Note: Be careful when hanging the masses to avoid jerking the block. PRISA LOSO LES OF sing spastions based on your graph. 2. Which meface pair swhisked tha greated frictional force? Explain why (How do you king use graph, Anair the no from your graph?) 3. Dom plesing additional weight in the wood block change the amount of frictional force between the block and the surface at bent Explain why te why rot. ( How do you know from your graph?) A. Kinetic friction (Uve wound blocks of Bat manus for race.l Place the board on the table with equal metal weights on the 4 different surfaces. The results are better if you use the flatter brass 10 a or 10 g masses or 4 like coins. Slowly lift the board from the starting position end. The wrights will begin to slide as in la raised. Once they begin sliding you are observing kinetic friction (fiction when me surface slides against migther surface], d amount of kinetic friction? How do you know based on what 4. Which surface has the greatest ama you observed? Make sure not to crafire safe friction with kinetic friction!!!!! 5, Which surface his the least amount of kinetic friction? How do you know based on what you observed? Make sure not to confuse static friction with kinetic friction!!! 6. How does the force of state friction compare with the force of kinetic friction? (Compare the surface pair with the greatest static friction with the surface pair that has the greatest kinetic friction chem } Discuss the results
