Physics B
posted by Mary on .
part 1
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
◦

F =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