# 17 repeat the previous steps using the other friction

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Chapter 8 / Exercise 37
College Physics
Serway/Vuille
Expert Verified
17.Repeat the previous steps using the other Friction Trays.Part II. Wooden Cart Moving Up an Inclined Plane.A.Find out the critical angle for the wooden cart to be on the verge of sliding down the inclined plane.1.Follow the same procedures as in Part I. to experimentally determine the static and kinetic friction coefficients between the Wooden Cart and the friction apparatus. 2.Theoretically predict the critical angle for the wooden cart with added mass to be an the verge of sliding down the inclined plane. Clearly show your FBD’s and Equation. 3.Experimentally confirm your prediction. B.With the incline angle smaller than the critical angle, determine the applied force needed to make the wooden cart to be on the verge of moving up the inclined plane, and the forcethat keeps the cart moving up with a constant speed.
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Chapter 8 / Exercise 37
College Physics
Serway/Vuille
Expert Verified
1.On attached calculation sheets, use the experimental information from above (partA), and determine theoretically from Newton’s First Law the value of force that will make the cart with added mass to be just on the verge of sliding UP the plane, and the force that keeps the cart moving up with a constant speed. CLEARLY show your FBD’s. In this case, use the incline angle smaller than the critical angle and use the same added mass as in A.2.Determine experimentally using the force sensor the value of force that will make the cart be part on the verge of sliding UP the plane, as well as the force that keeps the cart moving up with a constant speed. Find % difference experimental and calculated value of forces. Data Tables:Part 1. TrayTotal Mass(Tray +Weight)(Kg)NormalForce(N)Max StaticFriction(N)KineticFriction(N)StaticFrictionCoefficient,KineticFrictionCoefficient,White=95.2g0.5955.840.90.50.2800.2300.6456.331.10.80.7457.31.51.10.8458.281.61.30.9459.261.91.3Yellow=90.08g0.59015.7832.71.80.3810.3170.64016.2732.72.10.74017.2532.92.10.84018.2333.82.50.94019.2133.83.0Black=82.36g0.58245.7071.21.00.1670.2050.63246.1971.31.00.73247.1771.71.40.83248.1571.61.40.93249.1371.81.7
For example:For white tray trial 1: Do the same thing for all trials to get the normal force. For white tray.For Yellow Tray.
For black tray.Part 2. Data tablea).TrayTotal MassNormalMax StaticKineticStaticKinetic
(Tray+weight)(Kg)Force (N)Friction(N)Friction(N)FrictionCoefficient,FrictionCoefficient,Wood Tray0.65766.4442.31.00.3470.1320.70766.9342.51.20.80767.9343.11.30.90768.8943.21.211.00769.8743.51.2CalculatedExperimentDiff%Critical Angle19.137o22.00o14.96%For Wooden Tray. b).
, Total mass = 0.6576 kgCalculatedExperimentDiff%Force applied to keepwooden cart to be onthe verge of movingup (N)3.323.629.04%Force applied to keepwooden cart to movewith constant speed(N)1.961.88.16%Discussion and Questions: