Applied Mechanics and Graphic Statics
A train weighing 196 tonnes experiences a frictional resistance of 5(11/22) per tonne. The speed of the train at the top of a down gradient 1 in 78.4 is 36 km/hour. The speed of the train after running 1 km down the slope, is

10 √5 m/sec
5 √10 m/sec
5 √3 m/sec
3 √5 m/sec

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Applied Mechanics and Graphic Statics
Pick up the incorrect statement from the following. In a simple harmonic motion

Velocity is minimum at the end of the stroke
Velocity is maximum at its mean position
Acceleration is minimum at the end of the stroke
Acceleration is zero at the mean position

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