Advertisements
Advertisements
प्रश्न
As observed from earth, the sun appears to move in an approximate circular orbit. For the motion of another planet like mercury as observed from earth, this would ______.
पर्याय
be similarly true.
not be true because the force between earth and mercury is not inverse square law.
not be true because the major gravitational force on mercury is due to sun.
not be true because mercury is influenced by forces other than gravitational forces.
Advertisements
उत्तर
As observed from earth, the sun appears to move in an approximate circular orbit. For the motion of another planet like mercury as observed from earth, this would not be true because the major gravitational force on mercury is due to sun.
Explanation:
As observed from the earth, the sun appears to move in an approximately circular orbit. The gravitational force of attraction between the earth and the sun always follows the inverse square law. All planets move around the sun due to the huge gravitational force of the sun acting on them. The gravitational force on the mercury due to the earth is much smaller as compared to that acting on it due to the sun and hence it revolves around the sun and not around the earth.
APPEARS IN
संबंधित प्रश्न
What happens to the force between two objects, if the mass of one object is doubled?
What happens to the force between two objects, if the distance between the objects is doubled and tripled?
State two applications of universal law of gravitation.
At noon, the sun and the earth pull the objects on the earth's surface in opposite directions. At midnight, the sun and the earth pull these objects in same direction. Is the weight of an object, as measured by a spring balance on the earth's surface, more at midnight as compared to its weight at noon?
Let V and E represent the gravitational potential and field at a distance r from the centre of a uniform solid sphere. Consider the two statements:
(A) the plot of V against r is discontinuous.
(B) The plot of E against r is discontinuous.
A person sitting in a chair in a satellite feels weightless because
A tunnel is dug along a chord of the earth at a perpendicular distance R/2 from the earth's centre. The wall of the tunnel may be assumed to be frictionless. Find the force exerted by the wall on a particle of mass m when it is at a distance x from the centre of the tunnel.
The law of gravitation gives the gravitational force between :
How will the force of gravitation between two objects change if the distance between them is:
Almost zero
A ball is thrown up with a speed of 4.9 ms-1.
Calculate the time it takes to reach this height.
Where will you weigh more: at the centre of the earth or at the surface of the earth?
State the law of gravitation. Why is it called universal?
For the weight of body of mass 5 kg to be zero on equator of the earth, angular velocity of the earth must be (The radius of earth = 6400 km, acceleration due to gravity = 10 m/s2).
Different points in earth are at slightly different distances from the sun and hence experience different forces due to gravitation. For a rigid body, we know that if various forces act at various points in it, the resultant motion is as if a net force acts on the c.m. (centre of mass) causing translation and a net torque at the c.m. causing rotation around an axis through the c.m. For the earth-sun system (approximating the earth as a uniform density sphere).
The gravitational force between a hollow spherical shell (of radius R and uniform density) and a point mass is F. Show the nature of F vs r graph where r is the distance of the point from the centre of the hollow spherical shell of uniform density.
Newton's universal law of gravitation applies to ______.
Observe the figure and answer the questions:

- State Newton's universal law of gravitation.
- If the distance between the two bodies is tripled, how will the gravitational force between them change?
- What will happen to gravitational force, if mass of one of the object is doubled?
If the distance between two objects is doubled, the gravitational force becomes ______.
The gravitational force between two objects acts in which direction?
