## A body weighs 63 N on the surface of the earth. What is the gravitational force on it due to the earth at a height equal to half the radius of the earth? | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-8 Gravitation

Q.15:- A body weighs 63 N on the surface of the earth. What is the gravitational force on it due to the earth at a height equal to half the radius…

## A Saturn year is 29.5 times the earth year. How far is the Saturn from the sun if the earth is 1.50 ×108 km away from the sun? | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-8 Gravitation

Q.14:- A Saturn year is 29.5 times the earth year. How far is the Saturn from the sun if the earth is 1.50 ×108 km away from the sun?    …

## How will you ‘weigh the sun’, that is estimate its mass? The mean orbital radius of the earth around the sun is 1.5 × 108 km. | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-8 Gravitation

Q.13:- How will you ‘weigh the sun’, that is estimate its mass? The mean orbital radius of the earth around the sun is 1.5 × 108 km.   Answer:- Orbital radius…

## 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 =…

## 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)…

## 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…

## 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…

## 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…