5 chapter - numericals|| 9th class physics || Gravitation problems || matric numericals.
This video is related to chapter no 5 nunericals of 9th class physics ( Gravitation ).( Punjab textbook) @fanticer
0:00. 5.1 Find the gravitational force of attracti-
on between two spheres each of mass
1000kg. The distance the centres of
the sphere is 0.5 m. (2.67×10^-4N)
04:24. 5.2 The gravitational force between two
two identical lead spheres kept at 1m
apart is 0.006673N. Find their masses.
(10,000kg each)
09:18. 5.3 Find the acceleration due to gravity on
the surface of the Mars. The mass of
the mars is 6.42×10^23kg and it's
radius is 3370 km. (3.77 m/s^2)
11:47. 5.4 The acceleration due to gravity on the
Surface of moon 🌚 is 1.62m/s^2. The
radius of moon 🌝 is 1740km. Find the
mass of moon. (7.35×10^22 kg)
14:55. 5.5 Calculate the value of g at a height of
3600km above the surface of the earth
🌎. ( 4.0m/s^2)
20:48. 5.6 Find the value of g due to the earth at
geostationary satellite 🛰️. The radius
of the geostationary orbit is 48700km.
( 0.17m/s^2)
25:48. 5.7 The value of g is 4.0m/s^2 at a distan-
ce of 10000km from the centre of the
earth 🌍.Find the mass of the earth🌎
(5.99×10^24 kg)
29:50. 5.8 At what altitude the value of g would
become one fourth than on the surface
of the earth 🌎? ( one Earth's radius)
34:13. 5.9 A polar satellite 🛰️ is launched at
850km above earth. Find its orbital
speed. ( 7431m/s)
37:49. 5.10 A communication satellite is launch-
ed at 42000km above earth 🌎. Find
its orbital speed. ( 2876 m/s)