Wednesday

April 16, 2014

April 16, 2014

Posted by **YASH** on Sunday, May 22, 2011 at 6:32am.

- SCIENCE(PHYSICS) -
**drwls**, Sunday, May 22, 2011 at 9:12amIt must be a rather short train if it passes a pole in three seconds.

72 km/h = 20 m/s. The length of the train must be

L = 20 m/s * 3 s = 60 meters

To cross a bridge 540 m long, you have to add the times it takes the engine to cross (540/20 = 27 seconds) and the three seconds needed for the rest of the train to reach the end. That is a total of 30 seconds.

- SCIENCE(PHYSICS) -
**kjk**, Friday, June 10, 2011 at 3:51amminokn jkh kbhhbkhjkhjkhjkkkk

**Related Questions**

SCIENCE(PHYSICS) - A TRAIN IS MOVING ON A STRAIGHT TRCK AND TRAVELS AT A SPEED ...

SCIENCE(PHYSICS) - a train is moving on a straight track n travels at a speed ...

SCIENCE(PHYSICS) - a train is moving on a straight track n travels at a speed ...

physics - 1.A train passes an electric post in 8sec and a bridge of length 1km ...

SCIENCE(PHYSICS) - A train travels 40 km/hr for 0.2 hr, 50km/hr for next 0.2hr ...

SCIENCE(PHYSICS) - A train travels 40 km/hr for 0.2 hr, 50km/hr for next 0.2hr ...

maths - A person is cycling, parallel to a railway track, at a speed of 10 km/hr...

SCIENCE(PHYSICS) - A train travels 40 km/hr for 0.2 hr, 50km/hr for next 0.2hr ...

algebra 2 - I don't know how to do this the speed of train A is 18mph slower ...

Math - 2trains of the same length were running in opposite direction at 54km/hr ...