A man standing on the roof of a house of height h throws one particle vertically downwards and another particle horizontally with the same velocity u . The ratio of their velocities when they reach the earth's surface will be
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a
u2+2gh :u
b
1:2
c
1:1
d
u2+2gh :2gh
answer is C.
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Detailed Solution
for particle projected vertically downwards v2= u2+2gh for the particle projected horizontally horizontal velocity vx= u and vertical velocity vy after a height h is 2gh tolal velocity v=vx2+vy2 v2=u2+2gh