Physics - Kinematics Question with Solution | TestHub

PhysicsKinematics1-DEasy2 minPYQ_2020
PhysicsEasysingle choice

A train of lengthLmove with a constant speedVt.A person at the back of the train fires a bullet at timet=0towards a target which is at a distance ofD(at timet=0) from the front of the train (on the same direction of motion). Another person at the front of the train fires another bullet at timet=Ttowards the same target. Both bullets reach the target at the same time. Assuming the speed of the bulletsVbare same, the length of the train is

Options:

Answer:
B
Solution:



Bullets from both person reaches target at same instant, so we equate time to get,

L+D ( v t + v b ) = D ( v b + v t ) +T

L=( v b + v t )T

Stream:NTA_ABHYASSubject:PhysicsTopic:KinematicsSubtopic:1-D
2mℹ️ Source: PYQ_2020

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