A cyclist leans inwards when he is negotiating a curve so that
A) he may increase his speed
B) his weight may be reduced
C) necessary centripetal force may be available from the horizontal component of the normal reaction due to the track to maintain the curved motion.
D) no frictional force may be produced between the wheels and the axle
A) he may increase his speed
B) his weight may be reduced
C) necessary centripetal force may be available from the horizontal component of the normal reaction due to the track to maintain the curved motion.
D) no frictional force may be produced between the wheels and the axle
Answer & ExplanationAnswer: C) necessary centripetal force may be available from the horizontal component of the normal reaction due to the track to maintain the curved motion.
Explanation:
No circular or curved motion is possible without providing the necessary centripetal force. (C) provides this and so is the answer.
Choose the option which indicates a valid argument containing logically related statements that is, where the third statement is a conclusion drawn from the preceding two statements.
Sumanth walks 200 feet straight from his house, which is facing north and then he walks 100 feet in reverse direction.Further he takes a left turn and walks 300 yards.In Which direction is Sumanth now from his original position?
Starting From his house, Sumanth walks 200 feet straight towards North; we can write it as . Similarly, the other distances and directions can be considered and written as follows : (Notice that he covers 300 yards towards East; one yard = 3 feet and hence 300 yards = 900 feet)
Adding all south and all North distances and finding the net result, and also adding all East and all West distances and finding the net result, this can further be summarized as :
Thus, the direction from his original position is North-East.
A horse is facing north. It turns 90 degrees in the clockwise direction, then 180 degrees in the anti-clockwise and then another 90 degrees in the same direction. Which direction is the horse facing now?
Starting from the initial point facing north, the horse turns 90 degrees clockwise, which means it turns towards East. Similarly, the other directions can be considered and written as : EWS Thus, the direction it is facing now is South.
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