A 70 kg man stands in contact against the inner wall of a hollow cylindrical drum of radius 3 m rotating about its vertical axis with 200 rev/min.The coefficient of friction between the wall and […]
A particle of mass 100g tied to a string is rotated along a circle of radius 0.5 m.The breaking tension of string is 10N.The maximum speed with which particle can be rotated without breaking the […]
A heavy small sized sphere is suspended by a string of length l.The sphere rotates uniformly in a horizontal circle with the string making an angle θ with the vertical.Then, the time-period of this conical […]
A stone of mass 1 kg tied to a light inexensible string of length L=10/3 is whirling in a circular path of radius L in vertical plane.If the ratio of the maximum tension to the […]
A national roadway bridge over a canal is in the form of an arc of a circle of radius 49 m.What is the maximum speed with which a car can move without leaving the ground […]
A car is moving in a circular horizontal track of radius 10.0 m with a constant speed of 10.0 ms⁻¹.A plumb bob is suspended from the roof of the car by a light rigid rod […]
A particle is kept at rest at the top of a sphere of diameter 42m.When disturbed slightly, it slides down.At what height h from the bottom, the particle will leave the sphere?
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A 1kg stone at the end of 1m long string is whirled in a vertical circle at constant speed of 4 m/s.The tension in the string is 6N, when the stone at (take,g=10 m/s²).
A stone is tied to a string of length l and whirled in a vertical circle with the other end of the string as the centre.At a certain instant of time,the stone is at its […]
In Arthropoda, head and thorax are often fused to form cephalothorax, in which one of the following classes, is the body divided into head, thorax and abdomen
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(a) Insecta (b) Myriapoda (c) […]
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