Gravitational Fields Questions
Q3.
(a)
(i) Explain what is meant by the gravitational field strength at a point in a gravitational field.
(ii) State the SI unit of gravitational field strength.
(2 marks)
(b) Planet P has mass M and radius R. Planet Q has a radius 3R. The values of the gravitational field strengths at the surfaces of P and Q are the same.
(i) Determine the mass of Q in terms of M.
(ii) The graph shows how the gravitational field strength above the surface of planet P varies with distance from its centre.
An a line to the graph to show the variation of the gravitational field strength above the surface of Q over the range shown.
(6 marks)
(Total 8 marks)