Advertisements
Advertisements
प्रश्न
Why does the velocity of a stone thrown vertically upwards decreases?
Advertisements
उत्तर
Velocity of a stone thrown vertically upwards decrease because acceleration due to gravity is acting on downward direction.
APPEARS IN
संबंधित प्रश्न
What is the value of gravitational constant G (i) on the earth, and (ii) on the moon ?
Is the acceleration due to gravity of earth ‘g’ a constant ? Discuss.
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?
An object takes 5 s to reach the ground from a height of 5 m on a planet. What is the value of g on the planet?
Write scientific reasons.
The value of acceleration g is greater at the pole than at the equator.
Write scientific reasons.
The value of gravitational acceleration (g) decreases as we go above the Earth’s surface.
______ is used to change the speed of the car.
The ratio of masses of two planets is 2:3 and the ratio of their radii is 4:7 Find the ratio of their accelerations due to gravity.
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
The radius of the orbit of a geostationary satellite is (mean radius of the earth R, angular velocity about an axis in ω and acceleration due to gravity on earth's surface is (g) ______.
In the relation F = `"G M" "m"//"d"^2`, the quantity G
The force of attraction between two unit point masses separated by a unit distance is called
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.
A central particle M is surrounded by a square array of other particles, separated by either distanced or distance d/2 along the perimeter o the square. The magnitude of the gravitational force on the central particle due to the other particles is ______.

The moon has a mass of 1/81 that of the earth and a radius of 1/4 that of the earth. The escape speed from the surface of the earth is 11.2 km/s. The escape speed from the surface of the moon is ______.
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)
If the change in the value of g at the height h above the surface of the earth is the same as at a depth x below it, then ______.
(both x and h being much smaller than the radius of the earth)
A uniform ring of mass M and radius r is placed directly above a uniform sphere of mass 8M and of same radius R. The centre of the ring is at a distance of d = `sqrt3`R from the centre of the sphere. The gravitational attraction between the sphere and the ring is ______.
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?
A monkey of mass 50 kg climbs on a rope which can withstand the tension (T) of 350 N. If monkey initially climbs down with an acceleration of 4 m/s2 and then climbs up with an acceleration of 5m/s2. Choose the correct option (g = 10 m/s2).
