A particle performing uniform circular motion has angular momentum L.If its angular frequency is doubled and its kinetic energy halved, then the new angular momentum is
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(a) L/4 (b) 2L (c) 4L […]
The drive shaft of an automobile rotates at 3600 rpm and transmits 80 HP up from the engine to the rear wheels.The torque developed by the engine is
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(a) 16.58 Nm (b) 0.022 […]
When a ceiling fan is switched on, it makes 10 revolutions in the first 3s.Assuming a uniform angular acceleration,how many rotation it will make in the next 3s?
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(a) 10 (b) 20 […]
An inclined plane makes an angle of 30° with the horizontal.A solid sphere rolling down this inclined plane from rest without slipping has a linear acceleration equal to
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(a) g/3 (b) 2g/3 […]
A tube of length L is filled completely with an incompressible liquid of mass M and closed at both the ends.The tube is then rotated in a horizontal plane about one of its ends with […]
The ratio of the acceleration for a solid sphere(mass m and radius R)rolling down an incline of angle θ without slipping and slipping down the incline without rolling is
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(a) 5 : […]
A thin and circular disc of mass M and radius R is rotating in a horizontal plane about an axis passing through its centre and perpendicular to its plane with an angular velocity ?.If another […]
A small object of uniform density rolls up a curved surface with an initial velocity v’.It reaches upto a maximum height of 3v² / 4g with respect to the initial position.The object is
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Initial angular velocity of a circular disc of mass M is 𝜔₁.Then, two small spheres of m are attached gently to two diametrically opposite points on the edge of the disc.What is the final angular […]
When the disc rotates with uniform angulr velocity.Which of the following is not true?
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(a) The sense of rotation remains same (b) the orientattion of theaxis of rotation remainssame (c) the speed […]
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