A railway engine weghing 40 metric ton is travelling along a level track at a speed of `54 km//h`.What additional power is required to maintain the same speed up an incline rising 1 in 49,given `mu=0.1,g=9.8m s^-2`?

A train weghing 1000 quintals is running on a level road ith a uniform speed of 72 km//h .If teh frictional resistance amounts to 50 g wt.per quintal,find power in watt,take g= 9.8 m s^-2 .

Two trains A and B of length 400 m each are moving on two parallel tracks with a uniform speed of 72 km h^-1 in the same direction, with A ahead of B. The driver of B decides to overtake A and accelerates by 1 m s^-2 . If after 50 s, the guard of B just brushes past the driver of A, what was the original distance between them ?

The radius of curvature of a railway track at a place where the train is moving at a speed of 72 km h^-1 is 625 m.The distance between the rails is 1.5 m.Find the angle and the elevation of the outer rail so that there may be no side pressure on the rails. (g=9.8 m s^(-2)) .

A train runs along an unbanked circular track of radius 30 m at a speed of 54 km//h . The mass of the train is 10^6 kg . What provides the centripetal force required for this purpose — Hie engine or the rails ? What is the angle of banking required to prevent wearing out of the rail ?

A SONAR system fixed in a submarine operates at a frequency 40.0 kHz. An enemy submarine moves towards the SONAR with a speed of 360 km h^-1 . What is the frequency of sound reflected by the submarine ?Take the speed of sound in water to be 1450m s^-1 .

A straight horizontal conducting rod of length 0.45 m and mass 60 g is suspended by two vertical wires at its ends. A current of 5.0 A is set up in the rod through the wires. What will be the total tension in the wires if the direction of current is reversed keeping the magnetic field same as before? (Ignore the mass of the wires.) g = 9.8 m s^-2 .