boy moves with a velocity of 0.5ˆi−ˆj0.5𝑖^-𝑗^ ms–1. He finds rain at a velocity of 0.5ˆi−2ˆj0.5𝑖^-2𝑗^ ms–1. The speed of rain drop is
Question
Solution 1
The velocity of the rain as observed by the boy is given by the vector difference of the velocity of the rain and the velocity of the boy.
The velocity of the rain as observed by the boy = velocity of the rain - velocity of the boy
= (0.5i - 2j) - (0.5i - j) = 0.5i - 2j - 0.5i + j = -j m/s
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