The bicycle and rider shown in (Figure 1) have a mass of 85 kg with center of mass located at G. The coefficient of kinetic friction at the rear tire is μ = 0.8. igure 0.55 m 0.4 m < 1 of 1 1.2 m ▼ Part A Determine the normal reaction at the tire A, when the rear wheel locks for braking. Express your answer to three significant figures and include the appropriate units NA = Part B O Submit Previous Answers Request Answer X Incorrect; Try Again NB = μÅ Value Submit Determine the normal reaction at the tire B, when the rear wheel locks for braking. Express your answer to three significant figures and include the appropriate units O Di μÀ Units Value X Incorrect; Try Again Units Previous Answers Request Answer ? ?

Part B Determine the maximum force P that can be applied without causing movement of the 110-kg crate that has a center of gravity at G. The coefficient of static friction at the floor is Us = 0.38. Assume that tipping occurs. Figure 1 of 1 Express your answer to three significant figures and include the appropriate units. 0.5 m, 0.5 m µA ? P = 110 0.8 m Submit Previous Answers Request Answer 1.5 m 1.2 m X Incorrect; Try Again; 3 attempts remaining Provide Feedback Next >

Please help in 3, 4, and 5

A box with mass m = 2.75 kg rests on the top of a table. The coefficient of static friction between the box and the table is μs = 0.71 and the coefficient of kinetic friction is μk = 0.34. Write an expression for Fm the minimum force required to produce movement of the box on the top of the table. Solve numerically for the magnitude of the force Fm in Newtons. Write an expression for a, the box's acceleration, after it begins moving. (Assume the minimum force, Fm, continues to be applied.) Solve numerically for the acceleration, a in m/s2.

The 15.5-kg uniform bar is supported by a roller at A. A horizontal force of F = 80 N is applied to the roller. Neglect the weight and the size of the roller. (Figure 1) Figure y L. F = 80 N 2 m 1 of 1 Part A Determine the magnitude of the acceleration of the roller center at the instant the force is applied. Express your answer to three significant figures and include the appropriate units. aд = Submit Part B 0 = O μA Value Submit Request Answer Determine the direction of the acceleration of the roller center at the instant the force is applied, measured counterclockwise from the positive x axis. Express your answer using three significant figures. Units IVE ΑΣΦ 11 | vec Request Answer ? ? O

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The spool has a mass of 150 kg and a radius of gyration of KG = = 0.3 m. (Figure 1) Figure 250 mm G A 400 mm P Part A If the coefficients of static and kinetic friction at A are μ = 0.2 and μk 0.15, respectively, determine the angular acceleration of the spool if P = 60 N. Solve this problem if the cord and force P are directed vertically upwards. Express your answer to three significant figures and include the appropriate units. απ P Submit μA Value Provide Feedback Request Answer Ć Units 11? - Next >

The 2-kg spool S fits loosely on the inclined rod for which the coefficient of static friction is μ = 0.20. (Figure 1) Figure Part A V = If the spool is located 0.25 m from A, determine the maximum constant speed the spool can have so that it does not slip up the rod. Express your answer to three significant figures and include the appropriate units. PμÅ Value Submit A Request Answer 0.25 m Units 1 of 1 ] ?