two trains one of length 100m and another of length 125m are moving in mutually opposite directions along parallel lines, meet each other, each with speed 10m/s. if their acceleration are 0.3 m/s 2 and 0.2m/s 2 respectively then find the time taken to pass each other.

Question

Deepak Kumar · Answer

Length of first train = 100m. Length of second train = 125m. So, total crossing distance = 100+125 = 225m. Velocity of both train = 10m/s . acceleration of first train = 0.3m/s 2 . acceleration of second train = 0.2m/s 2 . Since both train moving to opposite direction of each other. so, velocity and acceleration is added to find the time taken to cross each other. so, velocity = 10+10 = 20m/s. acceleration = 0.3+0.2 = 0.5m/s . Now using kinemaics second equation . S = Ut +at 2 /2. 225 = 20t +0.5t 2 /2. t 2 +80t – 1000= 0. Now solving aove equation. t = 10.99s and -90.99s. negative value is not possible so t = 10.99 s.

Ajinkya · Answer

Do the same as he has done but in the place of 1000 there will be 900. t^2+80t-900=0 t^2+90t-10t-900=0 t(t+90)-10(t+90)=0 t=-90 and t=10. Here t=-90 is rejected so t=10 is the answer.

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two trains one of length 100m and another of length 125m are moving in mutually opposite directions along parallel lines, meet each other, each with speed 10m/s. if their acceleration are 0.3 m/s 2 and 0.2m/s 2 respectively then find the time taken to pass each other.

two trains one of length 100m and another of length 125m are moving in mutually opposite directions along parallel lines, meet each other, each with speed 10m/s. if their acceleration are 0.3 m/s² and 0.2m/s² respectively then find the time taken to pass each other.

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two trains one of length 100m and another of length 125m are moving in mutually opposite directions along parallel lines, meet each other, each with speed 10m/s. if their acceleration are 0.3 m/s 2 and 0.2m/s 2 respectively then find the time taken to pass each other.

two trains one of length 100m and another of length 125m are moving in mutually opposite directions along parallel lines, meet each other, each with speed 10m/s. if their acceleration are 0.3 m/s2 and 0.2m/s2 respectively then find the time taken to pass each other.

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two trains one of length 100m and another of length 125m are moving in mutually opposite directions along parallel lines, meet each other, each with speed 10m/s. if their acceleration are 0.3 m/s² and 0.2m/s² respectively then find the time taken to pass each other.