On a train moving along east with a constant speed v, a boy revolves a bob with string of length l on smooth surface of a train, with equal constant speed v relative to train. Mark the correct option(s).

A train is not allowed to move on a long railway bridge with constant speed

A train is moving at a constant speed V when its driverobserves another train in front of him on the same track and voing in the same direction with constant speed v . If the distance berween the trains is x . Trains is x then what should be the minimum retardation of the train so as to avoed collision?.

A train is moving at a constant speed V when its driverobserves another train in front of him on the same track and voing in the same direction with constant speed v . If the distance berween the trains is x . Trains is x then what should be the minimum retardation of the train so as to avoed collision?.

A train of length 100 m. Is moving with a constant speed of 10m/s. Calculate the time taken by the train to cross the electric pole ?

A train moving with a speed of 36 kmph takes 14 s to cross a bridge of length 100 m. The length of the train is

A train moving at a constant speed covers distance of 90 km in 2 hours. Find the time taken by the train to cover a distance of 540 km at the same speed.

A train moving with uniform speed passes a pole in 10 sec and a bridge of length 1200 m in 130 sec. speed of the train is :