Class 11

Science

Physics

Gravitation

If g is the acceleration due to gravity on the earth's surface, the gain in the potential energy of an object of mass m raised from the surface of the earth to a height equal to the radius R of the earth, is

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What is Archimedes principle ?

Construction of submarines is based on

Submarine's lactometers, hydrometers, etc. are designed according to __________.

A plenet moving along an elliptical orbit is closest to the sun at a distance $r_{1}$ and farthest away at a distance of $r_{2}$. If $v_{1}$ and $v_{2}$ are the linear velocities at these points respectively, then the ratio $v_{2}v_{1} $ is

A stone is released from the top of a tower of height $19.6$m. Calculate its final velocity just before touching the ground.

Write the another name of the buoyant force.

What do you mean by buoyancy ?

A stone is allowed to fall from the top of a tower $100$m high and at the same time another stone is projected vertically upwards from the ground with a velocity of $25m/s$. Calculate when and where the two stones will meet.