Question

tance (160 ft) to meters. (The conversion factors are in Appendix B.) and (3.241 U derive Equation (3.25). tance from 60 miles per hour (mph) is (b) Compute the average acceleration in meters/sec- measure of the brakes of an automobile. In this test, the ond and then use f ma to compute the average braking force in newtons. one brakes are applied while the car is traveling at a steady 60 mph. The braking distance is the distance from the point where the brakes were first applied to the point where the car comes to a complete stop. braking is given by the following equation: the average braking force from newtons to pounds force (Ibf). average acceleration during (d) Compute the avera acceleration in feet/second the B) to compute the average braking force in pounds. The fps system uses pounds and pounds to measure mass( the relationship between force, mass, and accelera- tion is given by the following equation: engineering fps system units (see Appendix to measure force (lbf) lbm). In this system, 2D, initial velocity of the car Complete the following for a 2600-lb car that has a brak- (a) Convert the initial velocity (60 mph) to feet V, Dbraking distance where ma ing distance of 160 ft. The factor ge is the acceleration due to The nominal value of & is 32.2 Compare the average braking force obtained in (d) with the converted result obtained in (c). gravit per the second and then to meters per mass (2600 Ibm) to kilograms and the braking dis- second. Convert (e)

Answer 1