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Two particles are thrown vertically upwards along the same line
with the same initial velocity u = 30 m/s, but at different times.
The second particle is thrown t seconds after the first. What should
be the minimum value of t so that the particles collide in mid-air?
Neglect air resistance. Express your answer in MKS or SI system
of units.
time should b less than the first particle come on ground applying neton second eqn s=ut+1/2at2 0=30t-1/2*10*t2 30=5t=>t=6s
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