Question

Rain is falling with a sped of `12sqrt(2)m//s` at an angle `45^@` with the vertical line. A man in a glider going at a speed of `u` at an angle of `37^@` with respect to the ground. Find the speed of the glider so that rain appears to him falling vertically. Consider the motion of the glider and rain drops in the same vertical plane.
A. `15ms^(-1)`
B. `30ms^(-1)`
C. `10ms^(-1)`
D. `25ms^(-1)`

Answer 1

Correct Answer - A
Horizontal component of both should be same.
`ucostheta=v_("rain") cos45^@`
`impliesucos37^@=12sqrt(2)xx1/(sqrt(2))impliesu=15m//s`