An electric bulb suspended from the roof of a train by a thread shifts through' an angle of 19.8° when the train goes round a curved path 100 m in radius. Find the speed of the train

An electric bulb suspended from the roof of a train by a thread shifts

1.	An electric bulb suspended from the roof of a train by a thread shifts through' an angle of 19.8° when the train goes round a curved path 100 m in radius. Find the speed of the train
Answer» Solution :`v= sqrt(RG TAN theta) = sqrt(100 xx 9.8 xx tan 19.8) = 18.78 m//s`