Question : Railway tracks are banked on curves so that
Option 1: the necessary centrifugal force may be obtained from the horizontal component of the weight of the train.
Option 2: no frictional force may be produced between the tracks and the wheels of the train.
Option 3: necessary centripetal force may be obtained from the horizontal component of the weight of the train.
Option 4: the train may not fall inwards.
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Correct Answer: necessary centripetal force may be obtained from the horizontal component of the weight of the train.
Solution : The correct option is necessary centrifugal force may be obtained from the horizontal component of the weight of the train.
A fast-moving train will typically veer off the track tangentially when it follows a curving course. The curved tracks are banked on the outside to create the necessary centripetal force needed to keep the train travelling on a curved course to prevent this.
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Question : Select the option that expresses the given sentence in indirect speech. The passenger says to the railway clerk, "Is the train late?"
Option 1: The passenger has asked the railway clerk whether the train is late.
Option 2: The passenger asked the railway clerk was the train late.
Option 3: The passenger asks the railway clerk was the train late.
Option 4: The passenger asks the railway clerk if the train is late.
Question : Directions: The weight of P is twice that of Q. The weight of Q is half that of R. The weight of R is 3 times the weight of T. The weight of T is half that of S. Who is the heaviest?
Option 1: P
Option 2: Q
Option 3: R
Option 4: P or R
Question : Directions: The weight of P is twice that of Q. The weight of Q is half that of R. The weight of R is 3 times of T. The weight of T is half that of S. The weight of T is greater than the weight of how many people among P, Q, R, and S?
Option 1: 1
Option 2: 0
Option 3: 3
Option 4: 4
Question : Directions: The weight of P is twice that of Q. The weight of Q is half that of R. The weight of R is 3 times that of T. The weight of T is half that of S. The weight of Q is greater than the weight of how many people among P, R, S, and T?
Option 2: 2
Question : Directions: Among five objects E, F, G, H, and K, the weight of H is 3 times the weight of K. The weight of G is 7.5 kg. The weight of E is twice the weight of F. The weight of K is 4 times the weight of G. If the weights of F and G are equal, then which is the second heaviest object?
Option 1: K
Option 2: H
Option 3: E
Option 4: F
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