Question

A person walking at 4 m/s finds rain drops
falling slant wise in to his face with a speed
of 4m/s at an angle of 30° with the vertical the
actual speed of the rain drops is




plz answer it​

Answer 1

Answer:

Answer

Explanation:

Velocity of rain wrt man= 4m/sat an angle 30º with vertical (given)

velocity of man wrt ground = 4m/s

from fig.

velocity of rain wrt man + velocity of man wrt ground = velocity of rain wrt ground (triangle law of vector addition)

so, velocity of rain wrt ground = √(4)2 + (4)2 + 2(4)(4)cos 120

                                        = √ 16+16+32(-0.5)

                                        =√32-16

                                        =√16 = 4m/s