Question

Raghu is running on a striaght horizontal
road on a
a rainy day with speed 4 m/s He
observes that the rain is falling down
vertically with a speed 3 m/s. The actual speed
of raindrops is a)3m/s
b) 4m/s
c)5m/s
d) 2m/s
​

Answer 1

Answer:

d)

Explanation:

Answer 2

Answer:

The actual speed of  rain is 5m/s.

Explanation:

Given that Raghu is running on horizontal road with the speed of 4 m/s and notices that the rain is falling  vertically with a speed of 3 m/s.

The question can be solved with the approach of Relative Motion.

Raghu seems that rain is falling vertically but he is running with a velocity of 4m/s which means the horizontal velocity of rain and Raghu are same which is 4m/s.

Raghu has no movement is vertical direction hence velocity of rain in vertical direction is 3m/s.

Taking the resultant of 4m/s and 3m/s the actual velocity,

$\sqrt{3^{2} +4^{2} }=5m/s.$

Hence, The actual speed of of raindrops is 5m/s.