KinematicsHard

Question

′A′ and ′B′ are moving along same straight line in opposite direction, each with speed 4 m/s with respect to ground. ′A′ sees that the rain drops are falling vertically while ′B′ sees the rain drops falling at an angle 45o with the vertical. The speed of rain w.r.t ground, is

Options

A.4√2 m/s
B.4√5 m/s
C.4 m/s
D.8 √2 m/s

Solution

≡ 
     
⇒  VRx = VA = 4 m/s ...(i)
⇒ VRy = VRx + vB = 8 m/s ...(ii)
and 
Speed of rain = 4√5 m/s

Create a free account to view solution

View Solution Free
Topic: Kinematics·Practice all Kinematics questions

More Kinematics Questions

A bomber plane moving at a horizontal speed of 20 m/s releases a bomb at a height of 80 m above ground as shown. At the ...In which case motion of a particle will be unidirectional :- (a) When particle moves with constant acceleration (b) When...The velocity - time graph of the a body falling from rest under gravity and rebounding from the a solid surface is repre...A weightless inextensible rope rest on a stationary wee forming an angle with the horizontal. One end moving to the rope...Block B has a down ward velocity in m/s and given by vB = , where t in s. Acceleration of A at t = 2 second is...