An automobile having a mass of 884 kg initially moves along a level highway at 68 km/h relative to the highway. it then climbs a hill whose crest is 69 m above the level highway and parks at a rest area located there. for the automobile, determine its changes in kinetic energy, in kj

ΔK.E. = - 142.72 kJ

Explanation:

mass = 884 kg

initial velocity = 68 km/h = 68 \times \frac {5}{18} = 18.89 m/s

final velocity = 0 m/s

height = 69 m

change in kinetic energy :

ΔK.E. =

ΔK.E. =

ΔK.E. =-142,716.05 J

ΔK.E. =-142.72 kJ

hence change in  kinetic energy of the automobile is  -142.72 kJ

import math

x=int(input("enter a number: "))

print (math.sqrt(math.fabs(