Two trains travelling on the same track are approaching each other wit

1.	Two trains travelling on the same track are approaching each other with equal speed of 40 m/s. The drivers of the trains begin to decelerate simultaneously when they are just 2 km apart. If the decelerations are both uniformly an equal, then the value of deceleration to avoid the collision should be (1) 0.8 m/s (2) slightly more than 0.8 m/s2 (3) slightly less than 0.8 m/s? (4) 0.5 m/s
Answer» Answer: -0.8 m/sec^2 Step-by-step explanation: initial VELOCITY is 40m/s to avoid collision on same TRACK they NEED to completely stop,therefore final velocity will be zero. distance is 2km i.e. 2000m. using 3rd EQUATION of motion 2as= v^2 - u^2 2a2000=-1600 a=-1600/2000 a=-0.4ms^-2 now total retardation for 2 trains will be into 2. you get the answer please Mark me brainliest

Two trains travelling on the same track are approaching each other with equal speed of 40 m/s. The drivers of the trains begin to decelerate simultaneously when they are just 2 km apart. If the decelerations are both uniformly an equal, then the value of deceleration to avoid the collision should be (1) 0.8 m/s (2) slightly more than 0.8 m/s2 (3) slightly less than 0.8 m/s? (4) 0.5 m/s

Answer»

Answer:

-0.8 m/sec^2

Step-by-step explanation:

initial VELOCITY is 40m/s

to avoid collision on same TRACK they NEED to completely stop,therefore final velocity will be zero.

distance is 2km i.e. 2000m.

using 3rd EQUATION of motion

2as= v^2 - u^2

2*a*2000=-1600

a=-1600/2000

a=-0.4ms^-2

now total retardation for 2 trains will be into 2.

you get the answer

please Mark me brainliest

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