Advertisements
Advertisements
Question
We can shield a charge from electric fields by putting it inside a hollow conductor. Can we shield a body from the gravitational influence of nearby matter by putting it inside a hollow sphere or by some other means?
Advertisements
Solution
A body cannot be shielded from the gravitational influence of nearby matter, because gravitational force between two point mass bodies is independent of the intervening medium between them.
It is due to the above reason, we cannot shield a body from the gravitational influence of nearby matter by putting it either inside a hollow sphere or by some other means.
APPEARS IN
RELATED QUESTIONS
State Kepler’s law which is represented by the relation r3 ∝ T2.
Can you think of two particles which do not exert gravitational force on each other?
The weight of an object is more at the poles than at the equator. Is it beneficial to purchase goods at equator and sell them at the pole? Does it matter whether a spring balance is used or an equal-beam balance is used?
Three equal masses m are placed at the three corners of an equilateral triangle of side a. Find the force exerted by this system on another particle of mass m placed at (a) the mid-point of a side, (b) at the centre of the triangle.
A particle of mass 100 g is kept on the surface of a uniform sphere of mass 10 kg and radius 10 cm. Find the work to be done against the gravitational force between them to take the particle away from the sphere.
State whether the gravitational force between two masses is attractive or repulsive ?
How will the force of gravitation between two objects change if the distance between them is:
Almost zero
All objects in the universe attract each other along the line joining their________.
The force of attraction between any two material objects is called __________.
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 moon's surface or at the earth's surface?
You can change the direction in which an object is moving by___________.
Does the force of the earth's gravitation affect the motion of the moon? Explain your answer with reasons.
State the universal law of gravitation and derive its mathematical expression.
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).
Write the answer of the question with reference to laws of gravitation.
Write the value of the universal gravitational constant.
If the mass of one object is doubled and distance remains the same, the gravitational force will ______.
A hollow spherical shell of uniform density exerts what gravitational force on a point mass placed inside it?
Newton formulated the Universal Law of Gravitation by combining the ideas of which two scientists with his own Laws of Motion?
