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A disc rotating about its axis from rest, acquires the angular speed 100 rev s-1 in 4 second. The angle rotated by it during these four seconds (in radian) is

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Important Questions on System of Particles and Rotational Motion

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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 18
A body rotating with uniform angular acceleration covers 100π (radian) in the first 5 s after the start. Its angular speed at the end of 5 s (in radian/s) is
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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 19
A wheel starting from rest is uniformly accelerated at 2 rad s-2 for 20 seconds. It is allowed to rotate uniformly for the next 10 seconds and is finally brought to rest in next 20 seconds. The total angle rotated by the wheel (in radian) is
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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 20
A body rotates about a fixed axis with an angular acceleration of 3 rad s-2. The angle rotated by it during the time when its angular velocity increases from 10 rad s-1 to 20 rad s-1 (in radian) is
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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 21
The torque of force F→=-2i^+2j^+3k^ acting on a point r→=i^-2j^+k^ about origin will be :
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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 22
Moment of a force of magnitude 20 N acting along positive x direction at point (3 m, 0, 0) about the point (0, 2, 0) (in N-m ) is
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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 23
A flywheel of moment of inertia 2 kg m2is rotated at a speed of 30 rad s-1. A tangential force at the rim stops the wheel in 15 second. Average torque of the force is
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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 24
A torque T acts on a body of moment of inertia I rotating with angular speed ω. It will be stopped.just after time,
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Gamma Question Bank for Medical Physics>Chapter 7 - System of Particles and Rotational Motion>EXERCISE>Q 25
A disc is rotating with angular velocity ω→. A force F→ acts at a point whose position vector with respect to the axis of rotation is r→. The power associated with the torque due to the force is given by