Advertisements
Advertisements
प्रश्न
How does the force of attraction between the two bodies depend upon their masses and the distance between them? A student thought that two bricks tied together would fall faster than a single one under the action of gravity. Do you agree with his hypothesis or not? Comment.
Advertisements
उत्तर
From Newton’s law of gravitation, the force of attraction between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centres i.e.,
F α `("m"_1"m"_2)/"d"^2`
The student’s hypothesis is wrong. As acceleration due to gravity is independent of the mass of the falling body, therefore, the two bricks tied together fall with the same speed as the single one to reach the ground at the same time under the action of gravity.
APPEARS IN
संबंधित प्रश्न
Fill in the following blank with suitable word :
The value of g on the earth is about………………. of that on the moon.
The value of gravitational acceleration (g) is ________ at the equator.
Write scientific reason.
The value of g at the centre of the earth is zero.
The acceleration due to gravity on moon is `(1/6)^"th"` times the acceleration due to gravity on earth. If the ratio of the density of earth 'ρe' to the density of moon 'ρm' is `5/3`, then the radius of moon 'Rm' in terms of the radius of earth 'Re' is ______.
At a height R above the earth's surface, the gravitational acceleration is ______.
(R = radius of earth, g = acceleration due to gravity on earth's surface.)
The force of attraction between two unit point masses separated by a unit distance is called
Write if the following statement is correct or wrong.
The value of g is the same everywhere on the surface of the earth.
A body is thrown from the surface of the earth with velocity 'u' m/s. The maximum height in m above the surface of the earth upto which it will reach is ______.
(R = radius of earth, g = acceleration due to gravity)
The value of gravitational acceleration g at a height h above the earth's surface is `"g"/4`, then ______. (R = radius of earth)
If the Moon's mass is 1/80 of Earth's mass and its radius is 1/4 of Earth's radius, what is the ratio of g on the Moon to g on Earth?
