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Two balls problems...please help!
Two particles are thrown vertically upwards along the same line with the same initial velocity u=30m/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.
2as=v^2-u^2
v=u+at
s=ut+1/2at^2
the distance covered by ball1 before lauch of ball 2 = 30t-5t^2
ball1 will stop 45m above the ground in 3s
not getting the next part...
Homework Statement
Two particles are thrown vertically upwards along the same line with the same initial velocity u=30m/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.
Homework Equations
2as=v^2-u^2
v=u+at
s=ut+1/2at^2
The Attempt at a Solution
the distance covered by ball1 before lauch of ball 2 = 30t-5t^2
ball1 will stop 45m above the ground in 3s
not getting the next part...