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प्रश्न
The _______ force is much weaker than other forces in nature.
पर्याय
gravitational
electromagnetic
nuclear force
intermolecular
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उत्तर
The gravitational force is much weaker than other forces in nature.
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संबंधित प्रश्न
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).
Answer the following:
You can shield a charge from electrical forces by putting it inside a hollow conductor. Can you shield a body from the gravitational influence of nearby matter by putting it inside a hollow sphere or by some other means?
State Kepler’s law which is represented by the relation r3 ∝ T2.
Which of the following quantities remain constant in a planetary motion (consider elliptical orbits) as seen from the sun?
A semicircular wire has a length L and mass M. A particle of mass m is placed at the centre of the circle. Find the gravitational attraction on the particle due to the wire.
A uniform metal sphere of radius a and mass M is surrounded by a thin uniform spherical shell of equal mass and radius 4a (In the following figure). The centre of the shell falls on the surface of the inner sphere. Find the gravitational field at the points P1 and P2 shown in the figure.
Explain the following:
People often shake the branches of a tree for getting down its fruits.
A ball is thrown vertically upwards. It goes to a height 20 m and then returns to the ground. Taking acceleration due to gravity g to be 10 ms-2 , find :
the total time of journey of the ball .
A force can produce ________, In an object at rest. It can __________ an object and change its __________ of motion.
What does a force do in the following case?
You apply brakes to a running car.
Name and state the action and reaction in the following case:
Hammering a nail.
Two equal and opposite forces acting at the same point on a stationary body. Will the body move? Give reason to explain your answer.
Is there a gravitational attraction between you and the book? Explain.
State Newton's law of gravitation. What is the difference between:
Gravity and gravitation
Solve the following problem.
Calculate the acceleration due to gravity at a height of 300 km from the surface of the Earth. (M = 5.98 × 1024 kg, R = 6400 km).
The gravitational force between two bodies is directly proportional to the product of the masses of those bodies and is _______ of the distance between them.
Three uniform spheres, each having mass m and radius r, are kept in such a way that each touches the other two. The magnitude of the gravitational force on any sphere due to the other two is
If the law of gravitation, instead of being inverse-square law, becomes an inverse-cube law- ______.
- planets will not have elliptic orbits.
- circular orbits of planets is not possible.
- projectile motion of a stone thrown by hand on the surface of the earth will be approximately parabolic.
- there will be no gravitational force inside a spherical shell of uniform density.
Newton's universal law of gravitation applies to ______.
If the mass of one object is doubled and distance remains the same, the gravitational force will ______.
