Categorized as: class-11-physics-unit-8

A rocket is fired from the earth towards the sun. At what distance from the earth’s centre is the gravitational force on the rocket zero? Mass of the sun = 2 ×1030 kg, mass of the earth = 6 × 1024 kg. Neglect the effect of other planets etc. (orbital radius = 1.5 × 1011 m). | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-8 Gravitation

Q.12:- A rocket is fired from the earth towards the sun. At what distance from the earth’s centre is the gravitational force on the rocket zero? Mass of the sun =…

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Choose the correct answer from among the given ones: For the problem 8.10, the direction of the gravitational intensity at an arbitrary point P is indicated by the arrow (i) d, (ii) e, (iii) f, (iv) g. | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-8 Gravitation

Q.11:- Choose the correct answer from among the given ones: For the problem 8.10, the direction of the gravitational intensity at an arbitrary point P is indicated by the arrow (i)…

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Choose the correct answer from among the given ones:The gravitational intensity at the centre of a hemispherical shell of uniform mass density has the direction indicated by the arrow (see Fig 8.12) (i) a, (ii) b, (iii) c, (iv) O. | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-8 Gravitation

Q.10:- Choose the correct answer from among the given ones:The gravitational intensity at the centre of a hemispherical shell of uniform mass density has the direction indicated by the arrow (see…

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Which of the following symptoms is likely to afflict an astronaut in space (a) swollen feet, (b) swollen face, (c) headache, (d) orientational problem? | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-8 Gravitation

Q.9:- Which of the following symptoms is likely to afflict an astronaut in space (a) swollen feet, (b) swollen face, (c) headache, (d) orientational problem?   Answer:- (a) Legs hold the…

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A comet orbits the Sun in a highly elliptical orbit. Does the comet have a constant (a) linear speed, (b) angular speed, (c) angular momentum, (d) kinetic energy, (e) potential energy, (f) total energy throughout its orbit? Neglect any mass loss of the comet when it comes very close to the Sun. | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-8 Gravitation

Q.8:- A comet orbits the Sun in a highly elliptical orbit. Does the comet have a constant (a) linear speed, (b) angular speed, (c) angular momentum, (d) kinetic energy, (e) potential…

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Does the escape speed of a body from the earth depend on (a) the mass of the body, (b) the location from where it is projected, (c) the direction of projection, (d) the height of the location from where the body is launched? | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-8 Gravitation

Q.7:- Does the escape speed of a body from the earth depend on (a) the mass of the body, (b) the location from where it is projected, (c) the direction of…

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Let us assume that our galaxy consists of 2.5 × 1011 stars each of one solar mass. How long will a star at a distance of 50,000 ly from the galactic centre take to complete one revolution? Take the diameter of the Milky Way to be 105 ly. | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-8 Gravitation

Q.5:- Let us assume that our galaxy consists of 2.5 × 1011 stars each of one solar mass. How long will a star at a distance of 50,000 ly from the…

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