box 94 N man 150 N girl and box 169 N trash can 188 N man and
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box 94 N
man 150 N
girl and box 169 N
trash can 188 N
man and box 244 N
box and trashcan 281 N
man and trashcan 338 N
refeigerator 500 N
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Part 2: STATIC FRICTION . ● . . . CLICK FORCES, SUM OF FORCES, VALUES, and MASSES For each mass in the chart, slide the slider SLOWLY until the mass starts to move and record it o your first object should be between 120 N and 140 N This pushing force at the moment the mass starts to move at balances out the maximum static force, as such we can use that force as our static force. Solve for the Force of Gravity (weight) for each mass. NOTE: Since we are attempting to apply a force slowly until we notice motion, we will have error in this experiment. Your graph will have data points slightly off the linear fit line. Object(s) Mass (kg) 1 box Man Girl + 1 Box Trash can Man + 1 box Box + trashcan Man + trashcan Refrigerator 50 80 40 100 130 150 180 200 Force of Gravity (N) Fg=m(9.8 m/s²) 490 882 980 1476 1764 1960 Normal Force (N) Cancels gravity in this situation so same value as Fg 410 784 882 980 1274 1470 1744 1966 Static Friction Force (N) IF THE OBJECT DOES NOT MOVE EVEN WITH 500 N of force, place an X through the data as it means we cannot measure the kinetic friction (not moving) or find the static friction s maximum value. Open up the program GRAPHICAL ANALYSIS and select MANUAL ENTRY . . . . . Title your X values FN with units N, our independent variable (X) will be Normal Force. O This should be a positive number, and the same magnitude (size or number) as the Force of Gravity Title your Y values Ffs with units N, our dependent variable (Y) will be the Static Friction Force o Ignore direction for this graph, all values should be positive values. Title your graph Kinetic Friction vs. Normal Force Sketch the graph after adding your line of best fit Record the m (slope) and b (y-int) value m= b= Write your y=mx+b model: The slope here represents our coefficient of friction (u) which you can think of as a measure of the stickiness between two surfaces. It is a measure of the ratio of friction and normal force. The subscript s next to the u indicates we are talking about static friction and an object not in motion. We can specify it as the formula below. Fts = H.(FN) Static Friction coefficient of static friction x Normal Force Your slope (m value) in the graph is the coefficient. Write it down us= 1. Using your coefficient from the graph (slope), multiply it by the normal force for the box (490 N). What do you get? 2. Does your answer above come out to be in the 120 N to 140 N range? 3. If your coefficient (u) were 0.45 and the Normal Force were 400 N, what would be the Friction force? Part 2: STATIC FRICTION . ● . . . CLICK FORCES, SUM OF FORCES, VALUES, and MASSES For each mass in the chart, slide the slider SLOWLY until the mass starts to move and record it o your first object should be between 120 N and 140 N This pushing force at the moment the mass starts to move at balances out the maximum static force, as such we can use that force as our static force. Solve for the Force of Gravity (weight) for each mass. NOTE: Since we are attempting to apply a force slowly until we notice motion, we will have error in this experiment. Your graph will have data points slightly off the linear fit line. Object(s) Mass (kg) 1 box Man Girl + 1 Box Trash can Man + 1 box Box + trashcan Man + trashcan Refrigerator 50 80 40 100 130 150 180 200 Force of Gravity (N) Fg=m(9.8 m/s²) 490 882 980 1476 1764 1960 Normal Force (N) Cancels gravity in this situation so same value as Fg 410 784 882 980 1274 1470 1744 1966 Static Friction Force (N) IF THE OBJECT DOES NOT MOVE EVEN WITH 500 N of force, place an X through the data as it means we cannot measure the kinetic friction (not moving) or find the static friction s maximum value. Open up the program GRAPHICAL ANALYSIS and select MANUAL ENTRY . . . . . Title your X values FN with units N, our independent variable (X) will be Normal Force. O This should be a positive number, and the same magnitude (size or number) as the Force of Gravity Title your Y values Ffs with units N, our dependent variable (Y) will be the Static Friction Force o Ignore direction for this graph, all values should be positive values. Title your graph Kinetic Friction vs. Normal Force Sketch the graph after adding your line of best fit Record the m (slope) and b (y-int) value m= b= Write your y=mx+b model: The slope here represents our coefficient of friction (u) which you can think of as a measure of the stickiness between two surfaces. It is a measure of the ratio of friction and normal force. The subscript s next to the u indicates we are talking about static friction and an object not in motion. We can specify it as the formula below. Fts = H.(FN) Static Friction coefficient of static friction x Normal Force Your slope (m value) in the graph is the coefficient. Write it down us= 1. Using your coefficient from the graph (slope), multiply it by the normal force for the box (490 N). What do you get? 2. Does your answer above come out to be in the 120 N to 140 N range? 3. If your coefficient (u) were 0.45 and the Normal Force were 400 N, what would be the Friction force?
Expert Answer:
Related Book For
A Survey of Mathematics with Applications
ISBN: 978-0134112107
10th edition
Authors: Allen R. Angel, Christine D. Abbott, Dennis Runde
Posted Date:
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