Physics 9702: MOTION IN A CIRCLE Topical Past Paper Questions

(a) State Coulomb's law. [2] (b) In a model of an atom, an electron is in a circular orbit around a proton, as shown in Figure 1.1. Figure 1.1 The electric potential energy of the electron is $ -1.09 \times 10^{-18} $ J. (i) Show that the radius of the orbit is $ 2.11 \times 10^{…

(a) State Newton's law of gravitation. [2] (b) A binary star consists of star A, of mass $4.0 \times 10^{30}$ kg, and star B, of mass $2.0 \times 10^{30}$ kg, separated by a distance of $3.3 \times 10^{12}$ m. The stars are both in circular orbit around their common centre of gra…

(a) State Newton's law of gravitation. [2] (b) A planet may be considered as a uniform sphere. A satellite is in circular orbit of period T around the planet at a height h above the surface. The height of the orbit can be adjusted by use of the satellite's rocket engines. Fig. 1.…