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October 23, 2014

October 23, 2014

Posted by **Mary** on Sunday, November 4, 2012 at 12:20pm.

A coordinate system (in meters) is constructed on the surface of a pool table, and

three objects are placed on the coordinate system as follows: a 1.5 kg object at the origin,

a 3.4 kg object at (0 m,1.8 m), and a 4.5 kg

object at (4.2 m,0 m).

THANK YOU!!

Find the resultant gravitational force exerted on the object at the origin by the other

two objects. The universal gravitational constant is 6.672 × 10

−11

N · m2

/kg

2

.

Answer in units of N

Part 2

At what angle does it act with respect to

the positive x axis? Let counterclockwise be

positive, within the limits of −180

◦

to 180

◦

.

Answer in units of

◦

- Physics B -
**Elena**, Sunday, November 4, 2012 at 5:17pmF =G•m1•m2/R²

the gravitational constant G =6.67•10^-11 N•m²/kg²,

F1= G•1.5•3.4/1.8²

F1= G•1.5•4.5/4.2²

F=sqrt(F1²+F2²)

α=arctan(F2/F1)

The angle with respect to the positive x axis is

180°+ α

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