Question

An automobile moving at 72km/hr reaches the foot of a smooth inclined plane when engine is switched off. How much distance up the inclined plane the automobile goes before coming to rest .The angle of inclination with horizontal is 30°and g=9.8

Answer 1

1/2mv^2=mgh
then h=1000/49,,,
cos30°=d/h
d=2000/49=40.8

Answer 2

1/2mv^2 = mgh

Then h= 1000/49

Cos30°=d/h

d=2000/49

d=40.8m