Advertisements
Advertisements
Question
Give scientific reasons for the following:
Newton's gravitational law is the universal law of gravitation.
Solution
Newton's gravitational law is applicable throughout the universe and to all particles. Hence, it is called the universal law of gravitation.
APPEARS IN
RELATED QUESTIONS
How does the force of gravitation between two objects change when the distance between them is reduced to half?
What is the magnitude of the gravitational force between the earth and a 1 kg object on its surface? (Mass of the earth is 6 × 1024 kg and radius of the earth is 6.4 × 106 m).
What is the importance of the universal law of gravitation?
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.
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).
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.
Can you think of two particles which do not exert gravitational force on each other?
A person sitting in a chair in a satellite feels weightless because
Inside a uniform spherical shell
(a) the gravitational potential is zero
(b) the gravitational field is zero
(c) the gravitational potential is same everywhere
(d) the gravitational field is same everywhere
Three uniform spheres each having a mass M and radius a are kept in such a way that each touches the other two. Find the magnitude of the gravitational force on any of the spheres due to the other two.
State whether the gravitational force between two masses is attractive or repulsive ?
Write an expression for the gravitational force of attraction between two bodies of masses m1 and m2 separated by a distance r.
Who stated the law of gravitation?
How will the force of gravitation between two objects change if the distance between them is:
Almost zero
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.
What does a force do in the following case?
You catch a kicked ball.
Name and state the action and reaction in the following case:
A book lying on a table.
State Newton's universal law of gravitation. Express it with the mathematical form of force of gravitation?
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?
