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let distance moved by P be s. and the distance moved by Q be s'.Yeah yeah, no problem!
s - s' = 5
use the equation : ut +0.5at^2
I have rounded off 0.5 * 9.81 = 4.9 to 5 for ease.
17(t+2) - 5(t+2)^2 - (7t - 5t^2) = 5
t = 0.9s
We get the other time if we substract this way, but this time using: ' t-2 ' for q
s - s' = 5
17(t) - 5(t)^2 - 7(t - 2) + 5(t - 2)^2 = 5
t = 2.9s
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