The mass center of the rear-engine 3120-lb car is at G. Determine the normal forces NA and Ng exerted by the road on the front and rear pairs of tires for the conditions of (a) being stationary and (b) braking from a forward velocity v with all wheels locked. The coefficient of kinetic friction is 0.95 at all tire/road interfaces. Express all answers in terms of pounds and as percentages of the vehicle weight. Answers: (a) While stationary: NA = Ne= NA = 72"-50" i (b) While braking: Ng= B 21" lb = i lb = i lb = lb = % of the total weight % of the total weight % of the total weight

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Design of Shafts and Shaft Components

The shaft is basically defined as the machine element that rotates, is in circular cross-section, it is majorly used to transfer the power from one part of the system to another, or from a power generating machine to a power absorbing machine. The shaft is supported on bearings and is rotated with the help of a set of gears or pulleys that are used for the power transmission. Bending moment, torsion, and an axial force act upon the shaft. Designing of shaft primarily involves determining stresses at a critical point in the shaft that is arising due to loading.