50. Find the magnitude of the resultant of two 10-N forces applied at the same point when the angle between them is 130°. 7.8 N 18.1 N 19.8 N 8.45 N
50. Find the magnitude of the resultant of two 10-N forces applied at the same point when the angle between them is 130°. 7.8 N 18.1 N 19.8 N 8.45 N
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Transcribed Image Text:50. Find the magnitude of the resultant of two 10-N forces applied at the same point when the
angle between them is 130°.
7.8 N
18.1 N
19.8 N
O 8.45 N
51. Two boys F1 and B2 act at a point. The magnitude of B1 is 8 kN and its direction is 60° above the
horizontai axis in the first quadrant. The magnitude of B2 is 5 kN and its direction is 53° below
the horizontal axis in the fourth quadrant. What is the magnitude of the resultant force?
7.0 kN
6.95 kN
8.6 kN
52. We can consider statics which the acceleration is zero.
True
False
Transcribed Image Text:47. What is the scalar product of two vectors equal to?
It is equal to the product of the magnitudes of two vectors and the sine of their included angle.
O It is equal to the product of the magnitudes of two vectors and the tangent of their included angle.
It is equal to the product of the magnitudes of two vectors and the square of the sine of their included angle
It is equal to the product of the magnitudes of two vectors and the cosine of their included angle.
48. An application of the cross product is
resolving a vector into components parallel and perpendicular to a given line.
determining the angle between two lines in space
determining moments of force.
determining tensions in cables.
49. It is a sketch of a body completely isolated or free from all other bodies.
free body diagram
equilibrium
coplanar
O force
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