Qualification > Sciences
Physics help A2
sizbeauty:
Q1,find the speed of the satellite which orbitz the moon near the moon's curface?
what is the kinetic energy per unit mass of the satellite?
(radius of moon: 1.74*10^6,mass of moon: 7.35*10^22)
Q2,astronomical observationz show the centre of mass of the earth-moon system is 4.7*10^6 m frm the centre of the earth.the distance b/w the centre of the earth n the moon is 384.4*10^6 m.find the mass of the moon M in terms of the mass of the earth E.
explain why both earth n moon must rotate about their common centre of mass,rather than the moon abot the centre of mass of the earth.
nid404:
--- Quote from: sizbeauty on September 19, 2010, 05:48:01 pm ---Q1,find the speed of the satellite which orbitz the moon near the moon's curface?
what is the kinetic energy per unit mass of the satellite?
(radius of moon: 1.74*10^6,mass of moon: 7.35*10^22)
Q2,astronomical observationz show the centre of mass of the earth-moon system is 4.7*10^6 m frm the centre of the earth.the distance b/w the centre of the earth n the moon is 384.4*10^6 m.find the mass of the moon M in terms of the mass of the earth E.
explain why both earth n moon must rotate about their common centre of mass,rather than the moon abot the centre of mass of the earth.
--- End quote ---
Mass of the satellite? :\
Do you have the entire question? Is it from a past paper?
sizbeauty:
this is the entire ques!!
itz frm unsolved topical pastpaperz,this one is frm year Nov88/p2/Q3.
do u have dese pastpprz??
nid404:
In the first question, the gravitation pull provides the necessary centripetal force. So you equate the two
GMm/ r2= mv2/r
You get v.
The second half, I don't really get it. The mass of the satellite ain't mentioned...I can't figure that.
sizbeauty:
ok np!! :)
thanx for de help,you r the saver!! :)
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