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train A B and C starts from station all trains moves with same speed for a certain time after sometime train C slows down and finally stops train A continues to move with the same speed however train B continuous to move with an increase speed create a single graph which represents the motion of a train se train B and train C? |
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Answer» Type your QUESTION... 11th Physics Motion in a Straight Line Speed and Velocity A train starts from rest an... PHYSICS A train starts from rest and moves with a constant acceleration for the first 1km. For the next 3 km, it has a constant velocity and for LAST 2 km, it moves with constant retardation to come to rest after a total time of motion of 10 min. Find the maximum velocity and the three time intervals in the three types of motion. December 26, 2019 avatar Aayush Vishwavani Share Save ANSWER Suppose the velocity of the train increases from 0 to V in time t 1
, then moves with constant speed v upto time t 2
and finally its velocity decreases from v to 0 between time interval t 2
and t. For motion between t=0 and t=t 1
let acceleration be alpha. Then, α= (t 1
−0) (v−0)
= t 1
v
⇒t 1
=vα Similarly, For retardation β β= (t−t 2
) (v−0)
= (t−t 2
) v
⇒t−t 2
= β v
⇒t 1
+t−t 2
= β v
+ α v
⇒t 2
−t 1
=t−v( α 1
+ β 1
) Now, for total displacement S=1+3+2=6km, and total time taken t=10min= 6 1
h We have. S= 2 v.t 1
+v(t 2
−t 1
)+v 2 (t−t 2
)
S= 2α v 2
+v[t−v[ α 1
+ β 1
]]+ 2β v 2
v S
=v[v[ α 1
+ β 1
]2+t−v( α 1
+ β 1
)] t= v s
+ 2 v( α 1
+ β 1
)
Explanation: please mark as brainlist answer and follow me |
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