Rain has horizontal velocity 8 m/s eastward and vertical velocity 15 m/s downward. A man runs eastward at 8 m/s. To the man, the rain appears:
Options

Question

Rain has horizontal velocity 8 m/s eastward and vertical velocity 15 m/s downward. A man runs eastward at 8 m/s. To the man, the rain appears:

G1 Physics · Accepted Answer

Rain velocity is v⃗_R = 8î - 15ĵ and man velocity is v⃗_M = 8î. Thus v⃗_RM = v⃗_R - v⃗_M = -15ĵ. The horizontal relative component is zero, so the rain appears vertically downward. Hence option A is correct.