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Introductory Physics Homework Help
Gravitational Force and Fields
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[QUOTE="drvrm, post: 5459771, member: 527528"] for example check the answer of question -3 its simple as G.M(3)/ R^2 = 6.67. 10^-11 . 5 . 10^30 /( 2. 1.5 . !0^11)^2 =(6.67. 5 /9) 10^-3 =(0.752 . 5 ). 10^-3 approx. comes to 3.76 x 10^-3 m/s^2 in other calculations also i will req. you not to put in values at the first instance but work with notations say m1, m2, m3 ,G and distances and put in values when you are finally calculating the numbers-the chances of error will be less. say for F(2-1) = G. m2. m1 / d(21) ^2 F(2-3) = G. m2. m3/ d(23) ^2 ; d(23) = Sqrt (2) d(21) so F(2-3) = Gm2.m3/ 2. d(21)^2 the above forces are making an angle of 45 degrees with each other so you can write resultant of two forces as R= sqrt ( F(2-1)^2 + F(2-3)^2 + 2. F(2-1). F(2-3) .Cos(45) ) then Tan (theta) = F(2-3) sin 45/ F(2-1) where theta is the angle made by R with F(2-1) many terms like G, m2. d(21)^2 will come out common from sqrt bracket and your calculation will be easy. [/QUOTE]
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