A thin uniform heavy rod of length l hangs from a horizontal axis passing through one end. The initial angular velocity ω that must be imparted to it to rotate it through 90° is :

Questions from System of Particles and Rotational Motion

1. A disc is rolling, the velocity of its centre of mass is . Which one of these will be correct ?

AIPMT 2001

2. The centre of mass of a system of three particles of masses and is taken as the origin of a coordinate system. The position vector of a fourth particle of mass such that the centre of mass of the four particle system lies at the point is a , where a is a constant. The value of is

3. Two particles of equal mass have velocities and . First particles has an acceleration while the acceleration of the other particle is zero. The centre of mass of the two particles moves in a path of

4. What is the torque of a force about the origin, if the force acts on a particle whose position vector is ?

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5. The angular velocity of a body is and a torque acts on it. The rotational power will be

NTA Abhyas 2020

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1. If and respectively denote energy and gravitational constant, then has the dimensions of:

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2. The de Broglie wavelength of an electron moving with kinetic energy of is nearly

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3. A car starts from rest and accelerates at At , a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at ? (Take

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4. A wheel with metallic spokes each long is rotated with a speed of in a plane perpendicular to a magnetic field of . The induced emf between the axle and rim of the wheel will be,

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5. A barometer is constructed using a liquid (density What would be the height of the liquid column, when a mercury barometer reads ?
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Q. A thin uniform heavy rod of length hangs from a horizontal axis passing through one end. The initial angular velocity that must be imparted to it to rotate it through is :

By conservation of energy we use

Questions from System of Particles and Rotational Motion

1. A disc is rolling, the velocity of its centre of mass is . Which one of these will be correct ?

2. The centre of mass of a system of three particles of masses and is taken as the origin of a coordinate system. The position vector of a fourth particle of mass such that the centre of mass of the four particle system lies at the point is a , where a is a constant. The value of is

3. Two particles of equal mass have velocities and . First particles has an acceleration while the acceleration of the other particle is zero. The centre of mass of the two particles moves in a path of

4. What is the torque of a force about the origin, if the force acts on a particle whose position vector is ?

5. The angular velocity of a body is and a torque acts on it. The rotational power will be

Physics Most Viewed Questions

1. If and respectively denote energy and gravitational constant, then has the dimensions of:

2. The de Broglie wavelength of an electron moving with kinetic energy of is nearly

3. A car starts from rest and accelerates at At , a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at ? (Take

4. A wheel with metallic spokes each long is rotated with a speed of in a plane perpendicular to a magnetic field of . The induced emf between the axle and rim of the wheel will be,

5. A barometer is constructed using a liquid (density What would be the height of the liquid column, when a mercury barometer reads ?
(density of mercury

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Q. A thin uniform heavy rod of length hangs from a horizontal axis passing through one end. The initial angular velocity that must be imparted to it to rotate it through is :

By conservation of energy we use

Questions from System of Particles and Rotational Motion

1. A disc is rolling, the velocity of its centre of mass is . Which one of these will be correct ?

2. The centre of mass of a system of three particles of masses and is taken as the origin of a coordinate system. The position vector of a fourth particle of mass such that the centre of mass of the four particle system lies at the point is a , where a is a constant. The value of is

3. Two particles of equal mass have velocities and . First particles has an acceleration while the acceleration of the other particle is zero. The centre of mass of the two particles moves in a path of

4. What is the torque of a force about the origin, if the force acts on a particle whose position vector is ?

5. The angular velocity of a body is and a torque acts on it. The rotational power will be

Physics Most Viewed Questions

1. If and respectively denote energy and gravitational constant, then has the dimensions of:

2. The de Broglie wavelength of an electron moving with kinetic energy of is nearly

3. A car starts from rest and accelerates at At , a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at ? (Take

4. A wheel with metallic spokes each long is rotated with a speed of in a plane perpendicular to a magnetic field of . The induced emf between the axle and rim of the wheel will be,

5. A barometer is constructed using a liquid (density What would be the height of the liquid column, when a mercury barometer reads ? (density of mercury

Latest Updates

5. A barometer is constructed using a liquid (density What would be the height of the liquid column, when a mercury barometer reads ?
(density of mercury