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) Which statement about a geostationary satellite is true? 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. It is always travelling from east to west. Its linear speed is equal to the speed of a point on the Earth's equator. 2 / 5 2) 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? 1.56 × 10–2 N kg–1 1.57 × 10–2 N kg–1 3.92 × 10–2 N kg–1 3.90 × 10–2 N kg–1 3 / 5 3) Two stars of equal mass M move with constant speed v in a circular orbit of radius R about their common centre of mass as shown in the figure below. What is the net force on each star? 4 / 5 4) A 20 kg satellite requires a speed of 2.0 km s–1 to stay in a circular orbit at a certain height above the Earth. What would be the speed, in km s-1, of a 100 kg satellite in the same orbit? 1.0 4.0 2.0 1.4 5 / 5 5) An object in a space capsule orbiting the Earth seems to be floating. Which statement describes the forces acting on the object? The weight of the object is the only force acting on it. The centripetal force on the object is equal and opposite to its weight. The centrifugal force on the object is equal and opposite to its weight. There are no forces on the object. Your score is Restart quiz
