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April 17, 2014

April 17, 2014

Posted by **Mary** on Sunday, November 4, 2012 at 1:51am.

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).

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

- Physics B -
**drwls**, Sunday, November 4, 2012 at 2:36amUse Newton's law of gravity to calculate the two perpendicular forces acting on the object at the origin. Call them Fx and Fy

The force in the +y direction is

Fy = G*(1.5)*(3.4)/(1.8)^2

Write the equation for the other force, Fx, and then add Fx and Fy vectorially.

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