Imagine a new planet having the same density as that of earth but 3 times bigger than the earth in size. If the acceleration due to gravity on the surface of earth is g and that on the new plane is g , then :
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The acceleration due to gravity on the planet A is 9 times the acceleration due to gravity on planet B. A man jumps to a height of 2m on the surface of A. What is the height of jump by the same person on the planet B?
In what direction does the buoyant force on an object immersed in a liquid act?
A seconds pendulum is mounted in a rocket. Its period of oscillation decreases when the rocket
Two particles of equal mass go around a circle of radius R under the action of their mutual gravitational attraction. Find the speed of each particle.
A spring balance measures the weight of an object in air to be 0.1N. It shows a reading of 0.08N when the object is completely immersed in water. If the value of acceleration due to gravity is 10m/s2, the volume of the object is
The force of buoyancy is equal to
Two spherical bodies of masses m and 4m and radii R and 2R respectively are released in free space with initial separation between their centres equal to 15 R. If they attract each other due to gravitational force only, then the distance covered by smaller sphere just before collision will be
A body projected vertically from the earth reaches a height equal to earth's radius before returning to the earth. The power exerted by the gravitational force is greatest.