65. An aeroplane is moving with hor...
Question

# 65. An aeroplane is moving with horizontal velocity u at height h. The velocity of a packet dropped from it on the earth's surface will be (g is acceleration due to gravity) (a) Vu? +2gh (b) /2gh (c) 2gh (d) Ju -28h . 1 1 .11

NEET/Medical Exams
Physics
Solution
195
4.0 (1 ratings)
Initially the pocket has only horizontal velocity equal to u When it reaches the ground it has horizontal velocity u and vertical velocity ( sqrt{2 g h} ) Therefore resultant velocity ( =sqrt{u^{2}+2 g h} ) Hence a is the correct answer