Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
At which of the following places is the gravitational acceleration zero?
At sea level
At the poles
At the equator
At the center of the earth
The gravitational potential energy of an object at a point above the ground is defined as the work done in ________.
keeping it at the centre
applying gravitational force on it
raising it from the ground to that point against gravity
allowing it to stand on the ground against gravity
When a body is taken from the equator to the North and South poles then its weight:
remains the same
increases at south pole and decreases at north pole
decreases
increases
What is the name of the force with which earth pulls everything towards itself?
Air pressure
Thrust
Gravity
Resistance
As we go below the earth surface, the gravitational acceleration _____________.
remains constant
either 1 or 2
Which power plant works on the basis of gravity of earth?
Geothermal
Windfarms
Hydropower
Nuclear power
The escape velocity of an object on the Earth will be _____ than the velocity of that object on the moon.
Same
More
Less
None of these
According to Keppler’s third law of planetary motion
Every planet moves around the sun in an elliptical orbit with the sun at one of the foci.
Arial velocity of planet revolving around sun remains constant
Arial velocity keeps on changing and it is maximum at apogee
The square of the period of revolution (T) of any planet around the sun is directly proportional to the cube of the semi-major axis of the orbit
The SI unit of 'g' is same as that of acceleration, that is ____.
ms1
ms-2
ms2
ms-1
The work done in one complete revolution of the moon around the earth is equal to:
Zero
Gravitational force × diameter of the orbit of the moon
Centripetal force × radius of the orbit of the moon
Gravitational force × circumference of the orbit of the moon
