Question

a car with vertical wind shield moving in a rain storm at a speed of of forty kilometer per hour the rain drops fall vertically with the constant speed twenty metre per second .the angle at which the rain drops strikes the windshield is

Answer 1

the horizontal component of falling rain is 40km/hr

now convert km/hr into m/s

40*5/18=11.11m/s

vertical component of falling the rain is 20 m/s

Q=tan^-1(horizontal/vertical)

Q=tan^-1(11.11/20)