a.What is the magnitude of the net gravitational force on the m1=21kg mass in the figure?(Figure 1) Assume m2=m3=10kg.
Express your answer using two significant figures.
b.What is the direction of the net gravitational force on the m1=21kg mass in the figure? Assume m2=m3=10kg.
Having problems loading image. You can look up image in google image the first image m2 =5.0 cm, m3=5.0 cm, Height is 20.0 cm
Distance between mass 1 and mass 2
D^2 = 20^2 + 5^2
D^2 =425cm^2
Gravitation force = G m1 m2 / D^2
G = 6.67 x 10^-11
= 6.67 x 10^-11 ( 10kg)(21kg) /0.0425 m^2
= 3.2956 X 10^-7N
Direction for mass 2 = 90 + invtan (5/20)= 104.03 degrees
Force for mass m1,m3 combination
Force is the same =3.2956 X 10^-7N
direction = 90 - invtan (5/20) = 75.96 degrees
resultant is the vector sum
x component m1,m2 combination = 3.2956 X 10^-9N cos (104..03) =
-7.989 x10^-8
x components m1,m3 combination = 3.2956 X 10^-9N cos (75.96) =
7.995 X10^-8
y component m1,m2 combination = 3.2956 X 10^-9N sin (104..03)=
3.1972 X 10^-7
y components m1,m3 combination = 3.2956 X 10^-9N sin (75.96)=
3.1972 x 10^-7
The resultant is the addition of the x and y components
the x components net to zero
the y components v add to 6.4x 10^-7......ANSWER
since the x component cancel out the resultant is along the y
axis
angle = 90 degrees ANSWER
Hope this helps you
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