Geocentric theory was proposed by
Ptolemy
Copernicus
Tycho Brahe
Kepler
The mass of a body is measured to be 12kg on earth. If it is taken to moon, the mass will be
72 kg
2 kg
12 kg
24 kg
Kepler’s concept propounded that the
Sun was stationary at the centre of the universe with the planets revolving around it in orbits.
The earth is stationary and is at the centre of the Universe, with the sun , moon, planets and stars, revolving around the earth.
Planets revolving around the sun in elliptical orbits with the sun at one of the foci of the ellipse.
None of these
Who calculated the acceleration of the moon towards the earth?
Newton
Brahe
Hooke
The weight of an object
is the quantity of matter in it
is the force with which it is attracted to the earth
is basically the same quantity as its mass but is expressed in different units
is independent of gravitational pull
Every object in the universe attracts every other object with a force which is inversely proportional to
square of the distance
distance
cube of the distance
product of masses
The numerical value of G is :
6.67 x 10-11 Nm2/kg2
6 x 1024 kg
6.4 x 106 m
6.67 x 10-11 Nm2/kg
When you put an object on a spring balance,do you get mass of an object or its weight ?
weight
force
mass
acceleration
If the masses of both the objects are doubled, the gravitational force of attraction is
Doubled
Halved
Becomes 4 times
Becomes (1/4)th
Calculate the gravitational force of attraction between a woman weighing 50 kg and her child of 12 kg separated by a distance of 2m.
10-8 N
10-13 N
10-11 N
10-12 N
