Gravitation — Set 3

Two masses 2 kg and 3 kg are 2 m apart. Using G = 6.67×10^-11 N m^2 kg^-2, what is the gravitational force between them (approximately)?

At a distance 2R from Earth’s center (R = Earth’s radius), the value of g compared to its surface value g is?

Using v = sqrt(gR) with g = 9.8 m/s^2 and R = 6.4×10^6 m, the orbital speed near Earth’s surface is closest to?

Using v_escape = sqrt(2gR) with g = 9.8 m/s^2 and R = 6.4×10^6 m, the escape velocity from Earth is closest to?

If the orbital radius of a satellite is increased by a factor of 8, its time period changes by what factor?

Why is a person’s weight generally slightly less at the equator than at the poles?

The magnitude of gravitational field strength at distance r from a point mass M is?

The principle of superposition in gravitation states that?

For a spherically symmetric body, the gravitational field outside it behaves as if?

The first cosmic velocity for a circular orbit close to Earth’s surface is?