13.4b Ex3 ON13 P41 Q1 Rock Escape from Moon | A2 Gravitational Fields | CAIE A Level 9702 Physics

Example 3 - 9702/41/O/N/13: (b) The Moon may be considered to be an isolated sphere of radius 1.74 × 10^3 km with its mass of 7.35 × 10^22 kg concentrated at its centre. #9702w13p41 #A2orbitalMechanicsP4 #Lv3

(i) A rock of mass 4.50 kg is situated on the surface of the Moon. Show that the change in gravitational potential energy of the rock in moving it from the Moon’s surface to infinity is 1.27 × 10^7 J
(ii) The escape speed of the rock is the minimum speed that the rock must be given when it is on the Moon’s surface so that it can escape to infinity. Use the answer in (i) to determine the escape speed. Explain your working

(c) The Moon in (b) is assumed to be isolated in space. The Moon does, in fact, orbit the Earth. State and explain whether the minimum speed for the rock to reach the Earth from the surface of the Moon is different from the escape speed calculated in (b).

#A2GravitationalFields Playlist:

Tuition/Tutoring inquiries:

#CambridgeALevelPhysics

[me-sili]

I really can't thank you enough for all your efforts. Thank you so much!!

[BOBO_]

Thx! I realise now that both circular motion and G-field topics have many application of the conservation of mechanical energy