# Class 9 Physics Chapter 5 Gravitation Numericals 2024

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## Class 9 Physics Chapter 5 Gravitation Numericals

• Find the gravitational force of attraction between two spheres each of mass 1000 kg. The distance between the centers of the spheres is 0.5 m.
• The gravitational force between two identical lead spheres kept at 1 m apart is 0.006673 N. Find their masses.
• Calculate the value of g at a height of 3600 km above the surface of the Earth.
• Find the value of g due to the Earth at a geostationary satellite. The radius of the geostationary orbit is 48700 km.
• The value of g is 4.0 ms at a distance of 10000 km from the center of the Earth. Find the 24 mass of the Earth.
• A communication satellite is launched at 42000 km above Earth. Find its orbital speed.
• A polar satellite is launched at 850 km above Earth. Find its orbital speed.
• At what altitude the value of g would become one-fourth that on the surface of the Earth?
• Find the acceleration due to gravity on the surface of Mars. The mass of Mars is 23 6.42×10 kg and its radius is 3370 km.
• The acceleration due to gravity on the surface of the moon is 1.62 ms. The radius of the moon is 1740 km. Find the mass of the moon.

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