Physics WPH11: Further Mechanics Topical Past Paper Questions

In the Bohr model of a hydrogen atom, an electron moves in a circular orbit around a proton. (a) A particle orbits a point O, in a circular path of radius r, as shown. The particle moves at a constant speed v. The dots represent two positions, an angle $ \theta $ apart. The accel…

The Gaia globe is a three-dimensional model of the Earth, as shown. The inflated globe is suspended from above and is able to rotate. The globe is filled with nitrogen gas. When fully inflated the globe has a radius of 3.50 m. (a) Calculate the mass of nitrogen gas needed to exer…

In the 17th century, Johannes Kepler derived his laws of planetary motion. (a) One law related the orbital time T of a planet to its average distance r from the Sun. Show that $$ T^{2}=\frac{4\pi^{2}r^{3}}{G M} $$ where M is the solar mass. (3) (b) Luminosity measurements suggest…