Given the gure below showing vectors 3 , j , and C", what is the magnitude of vector :3? _ 1? 3.61 0.00 4.24 2.78 1.03 \f0/153 The four 3.0 kg masses (each of which is a uniform sphere) shown below are initially placed so that their centers are at the four corners of a square with side length of 2.0 m. What is the net gravitational force on mass "A" from the other three masses shown? A B y C (D X We remind you that the force of gravity between two masses is attractive and directly along the straight line joining the two objects. The magnitude is F. = Gmim2 with G = 6.67 x10-1 N m2/kg2 7-2We remind you that the force of gravity between two masses is attractive and directly along the straight line joining the two objects. The magnitude is F. = Gm,my with G = 6.67 x10-11 N m2/kg2 (20.87 - 20.8]) N (1.50x10-107-1.50x10-10 j) N (2.87x10-10 1 ) N (-6.67x10-101-6.67x10-10 j)N (2.03x10-10 1 - 2.03x10-10 j Nwas 0/153 A room contains two identical neutral metal spheres, one touching the other and each on its own insulating wooden stand. You enter the room carrying a positively charged glass rod. You are only allowed to move the spheres by touching their wooden stands. You are not allowed to touch either sphere directly with your hands. You are allowed to touch one or both spheres with the charged rod. Which of the following could depict the final state of the spheres after you leave the room with the rod? (In the figures, if the spheres have no space between them, assume they are touching one another.) O 1 or 2 O 1 or 3 O 2,3 or 5 O 3 O 1,2, or 4