Mechanical Engineering - Engineering Mechanics - Discussion
Discussion Forum : Engineering Mechanics - Section 1 (Q.No. 10)
10.
If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is
Discussion:
35 comments Page 4 of 4.
Sathish said:
1 decade ago
Because two forces and one resultant.
Resultant between two forces.
Resultant between two forces.
Krunal said:
1 decade ago
Why 360/3?
Gunasekaran said:
1 decade ago
Why 360 is divide by 3?
Krushna said:
1 decade ago
Total space angle is 360.
To forces having same magnitude.
And resultant also having same of both.
So 360/3 = 120.
To forces having same magnitude.
And resultant also having same of both.
So 360/3 = 120.
PRADEEP KUMAR VERMA said:
1 decade ago
Let forces are which maggnitude P.
SO GIVEN IN Q. RESULTANT = P.
SO WE KNOW THAT RESULTANT.
R^2= A^2+B^2+2ABCOSθ THEN
P^2=P^2+P^2+2P*PCOSθ
P^2=P^2+P^2+2P^2COSθ
0=1+2COSθ
COSθ=-1/2=COS120.
SO θ=120.
SO GIVEN IN Q. RESULTANT = P.
SO WE KNOW THAT RESULTANT.
R^2= A^2+B^2+2ABCOSθ THEN
P^2=P^2+P^2+2P*PCOSθ
P^2=P^2+P^2+2P^2COSθ
0=1+2COSθ
COSθ=-1/2=COS120.
SO θ=120.
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