Title 2017 GCE A level H2 Physics 9749 Ans_excl P1 Solution.pdf ✅

1 H2 Physics Nov 2017 GCE A-Level Solutions Paper 1

3 Charon will be above the same place (i.e. the probe) on the surface of Pluto at all times. OR Charon appears to be geostationary. {i.e. when Pluto spins 1 round about it’s own axis in 6.36 days, Charon would have also revolved 1 round around the centre of Pluto} 2. The same face of Charon will be seen from/ always faces Pluto’s space probe. {i.e. when Pluto spins 1 round about it’s own axis in 6.36 days, Charon would have also revolved 1 round around the centre of Pluto. On top of this, Charon also revolves about its own axis in the same time of 6.36 days} (b) gp = GMp rp 2 = (6.67 × 10−11)(1.31 × 1022) (1.20 × 103 × 103) 2 = 0.607 N kg-1 (c)(i) The rock is moving in a linear path towards the surface of Pluto. By conservation of energy, GPE at infinity + KE at infinity = GPE at surface of Pluto + KE at surface 0 + 0 = − GMpM r + 1⁄2 Mv2 Hence v = √2gpr (shown). (ii) For the rock to travel in a linear path from Pluto’s surface to infinity, By conservation of energy, GPE at surface of Pluto + KE at surface = GPE at infinity + KE at infinity − GMpM r + 1⁄2 Mv2 min = 0 + 0 {r is the radius of Pluto} vmin = √2gpr = √2 (0.6068)(1.20 × 106) {use value of gp from (b)} = 1210 m s-1 3 (a) A wave where the oscillations/ vibrations are confined to only 1 direction, in the plane normal to the direction of transfer of energy. Charon Charon Pluto Pluto