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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.


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.


Grade:

1 Answers

neeraj agarwal
34 Points
9 years ago

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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