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प्रश्न
Why does the velocity of a stone thrown vertically upwards decreases?
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उत्तर
Velocity of a stone thrown vertically upwards decrease because acceleration due to gravity is acting on downward direction.
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संबंधित प्रश्न
Fill in the following blank with suitable word :
The value of g on the earth is about………………. of that on the moon.
If the value of g suddenly becomes twice its value, it will become two times more difficult to pull a heavy object along the floor. Why?
The radius of planet A is half the radius of planet B. If the mass of A is MA, what must be the mass of B so that the value of g on B is half that of its value on A?
Write scientific reason.
The value of g at the centre of the earth is zero.
______ is used to change the speed of the car.
The mass of the moon is `1/81` of the mass of the earth. Its diameter is `1/3.7` of that of the earth. If acceleration due to gravity on the surface of the earth is 9.8 m/s2, then the acceleration due to gravity on the surface of the moon.
The acceleration due to gravity on a planet is 1.96 m/s2. If it is safe to jump from a height of 3 m on tbe earth, the corresponding height on the planet will be ____________.
The depth 'd' below the surface of the earth at which acceleration due to gravity becomes `(g/n)` is ______.
R = radius of the earth, 'g' = acceleration due to gravity, n = integer
When the value of acceleration due to gravity 'g' becomes `(g/3)` above the earth's surface at height 'h' then relation between 'h' and 'R' is ______.
R =radius of the earth
The radius of the earth is. 6400 km and that of mars is 3200 km. The mass of the earth is about 10 times the mass of mars. Weight of the object on the earth is 200 N. What will be its weight on the mars?
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.)
Write if the following statement is correct or wrong.
The value of g is the same everywhere on the surface of the earth.
A mass attached to one end of a string crosses top-most point on a vertical circle with critical speed. Its centripetal acceleration when string becomes horizontal will be ______. (g = gravitational acceleration)
A lift of mass 'm' is connected to a rope which is moving upward with maximum acceleration 'a'. For maximum safe stress, the elastic limit of the rope is 'T'. The minimum diameter of the rope is ______.
(g = gravitational acceleration)
The depth 'd' at which the value of acceleration due to gravity becomes `"I"/"n"` times the value at the earth's surface is ______. (R = radius of earth)
The acceleration due to gravity on the earth of radius Re is ge, and that on moon of radius Rm, is gm. The ratio of the masses of the earth and moon is given by ______.
The mass of a spaceship is 1000 kg. It is to be launched from the earth's surface out into free space. The value of g and R are 10 m/s2 and 6400 km, respectively. The required energy for this work will be ______.
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?
