Answer to Question #285092 in Mechanical Engineering for Johnny

Question

A vehicle travelling at 70 km/hr is accelerating up a hill with a gradient of 1 to 20. If

the mass of the car is 1500 kg, the frontal area is 1.95 m2

, rolling resistance of 240 N

and the drag coefficient of the body if 0.035. At this instant, the engine is developing

56.80 KW at 4000 rev/min and the transmission efficiency is 80%. If the rear axle

ratio is 5.2 to 1 and the rolling radius is 35 cm. Calculate the acceleration of the

vehicle. (Take TR = RG + RR + RA)

Answer 1

Answer is given in the picture: