Question

A bus with a vertical wind shield moves horizontally
at a speed of 40 km/hr, while rain is falling
vertically at a speed of 30 km/hr. The angle at
which rain drops strike the wind shield is
(1) 37°
(2) 45° (3)53°
(4) 30°​

Answer 1

Answer:

(3) 53°

Explanation:

Vr = -30 j km/h

Vb = 40 i km/h

Vrb = Vr - Vb = - 40 i - 30 j

angle with vertical = atan(40/30) = 53°