Revision: ADVANCED PHYSICS – Gravitational Fields Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. Advanced Physics: Gravitational Fields - Revision Quiz Test your understanding of Advanced Physics: Gravitational Fields here: 1 / 5 1) Outside a uniform sphere of mass M, the gravitational field strength is the same as that of a point mass M at the centre of the sphere. The Earth may be taken to be a uniform sphere of radius r. The gravitational field strength at its surface is g. What is the gravitational field strength at a height h above the ground? 2 / 5 2) Which statement about a geostationary satellite is true? Its linear speed is equal to the speed of a point on the Earth's equator. It is always travelling from east to west. It can remain vertically above any chosen fixed point on the Earth. It has the same angular velocity as the Earth's rotation on its axis. 3 / 5 3) The distance between a point, X, in space and the centre of the Earth is 25 times the radius of Earth. If the gravitational field strength on the surface of the Earth is 9.81 N kg–1, what is the gravitational field strength due to Earth at X? 3.92 × 10–2 N kg–1 3.90 × 10–2 N kg–1 1.56 × 10–2 N kg–1 1.57 × 10–2 N kg–1 4 / 5 4) The acceleration of free fall on the surface of the Earth is 6 times its value on the surface of the Moon. The mean density of the Earth is 5/3 times the mean density of the Moon. What is the ratio of the radius of the Earth to the radius of the Moon? 3.6 6.0 10 1.9 5 / 5 5) An experimental satellite is found to have a weight W when assembled before launching from a rocket site. It is placed in a circular orbit at a height h = 6R above the surface of the Earth (of radius R). What is the gravitational force acting on the satellite whilst in orbit? W/6 W/7 W/36 W/49 Your score is Restart quiz
