Finding the coefficient of friction (mew) DUE TOMOROW

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SUMMARY

The discussion focuses on calculating the coefficient of friction (μ) for curling stones based on experimental data collected during a physics class. Two sets of trials were conducted: one with sweeping and one without. The normal force (Fn) was calculated as 196.2 N using the mass of the stone (20 kg) and gravitational acceleration (9.81 m/s²). Participants are advised to use kinematic equations to determine the force of friction, which is essential for calculating μ.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with kinematic equations
  • Basic knowledge of friction and its coefficients
  • Ability to convert units (e.g., feet to meters)
NEXT STEPS
  • Calculate the average coefficients of friction for both sweeping and non-sweeping trials
  • Learn about kinematic equations, specifically the "vusat" equations
  • Explore the concept of linear deceleration due to friction
  • Investigate the effects of different surfaces on friction coefficients
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This discussion is beneficial for physics students, educators, and anyone interested in understanding the practical applications of friction in sports and mechanics.

newton2008
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Finding the coefficient of friction (mew) DUE TOMOROW :(

Our physics class went curling, and this is the data we had to collect..

Without Sweeping

Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Trial 6 Trial 7
Time (s) 21.37 21.70 21.65 21.95 20.47 20.69 22.30
Distance (m) 115.50 145.50 125.50 112.00 28.00 28.50 261.50

With Sweeping

Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Trial 6 Trial 7
Time (s) 22.06 20.75 24.31 21.50 22.13 21.87 18.15
Distance (m) 147.00 75.50 320.00 18.00 255.00 198.00 42.00

Distances are measured past the second hog line, add 868 inches, and convert to metres.

Mass of Stone = 20 kg (2 sig. digs)
1 ft. = 0.3048 m

One of the question asks to: Calculate the average coefficients of friction with and without sweeping.

So I calculated the Fn = (20)(9.81) = 196.2 N

But the Force of Friction = (mew) * (Fn)

How am i supposed to find the force of friction? So then i can find the (mew)

someone pleaseeeee help
 
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i suppose you could assume the decceleration due to friction was linear in time so, knowing the final speed, time and distance, you could calculate the decceleration and hence the force using the "vusat" equations