The weight of a body on surface of earth is 12.6 N. When it is raised to a height
The weight of a body on surface of earth is 12.6 N. When it is raised to a height half the radius of earth its weight will be
Options
(a) 2.8 N (b) […]
Gravitation
A planet in a distinct solar system is 10 times more massive than the earth
A planet in a distinct solar system is 10 times more massive than the earth and its radius is 10 times smaller. Given that the escape velocity from the earth is 11 km s⁻¹ the […]
The acceleration due to gravity becomes (g/2) where g=acceleration due to gravity
The acceleration due to gravity becomes (g/2) where g=acceleration due to gravity on the surface of the earth at a height equal to
Options
(a) 4R (b) R/4 (c) 2R (d) R/2
Correct Answer: […]
A satellite of mass m revolves around the earth of radius R at a height x from
A satellite of mass m revolves around the earth of radius R at a height x from its surface. If g is the acceleration due to gravity on the surface of the earth, the orbital […]
When you move from equator to pole, the value of acceleration due to gravity (g)
When you move from equator to pole, the value of acceleration due to gravity (g)
Options
(a) Increases (b) Decreases (c) Remains the same (d) Increases then decreases
Correct Answer:
Increases
Explanation:
g’=g-Rω². cos²λ […]
A particle of mass ‘m’ is kept at rest at a height 3R from the surface of earth
A particle of mass ‘m’ is kept at rest at a height 3R from the surface of earth, where ‘R’ is radius of earth and ‘M’ is mass of earth. The minimum speed with which […]
The radius of a planet is twice the radius of earth. Both have almost
The radius of a planet is twice the radius of earth. Both have almost equal average mass densities. If Vp and Ve are escape velocities of the planet and the earth, respectively, then,
Options […]
If vₑ is escape velocity and vₙ is orbital velocity of a satellite
If vₑ is escape velocity and v(o) is orbital velocity of a satellite for orbit close to the earth’s surface, then these are related by:
Options
(a) v(o) = √2 vₑ (b) v(o) […]
A geostationary satellite is orbiting the earth at a height of 5R above that surface
A geostationary satellite is orbiting the earth at a height of 5R above that surface of the earth, R being the radius of the earth. The time period of another satellite in hours at a […]
A spherical planet has a mass Mp and diameter Dp. A particle of mass
A spherical planet has a mass Mp and diameter Dp. A particle of mass m falling freely near the surface of this planet will experience an acceleration due to gravity, equal to
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