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# Lesson Worksheet: Moment of a Force about a Point in 2D: Scalar Mathematics

In this worksheet, we will practice finding the sum of moments of a group of forces acting on a body about a point in 2D.

**Q3: **

In the figure, determine the magnitude of the sum of the moments of the forces 13 N, 18 N, and 7 N about rounding your answer to two decimal places.

**Q4: **

Determine the moment of the force that has a magnitude of 11 N about point . Give your answer in Nβ m.

**Q6: **

In the given figure, find the magnitude of the sum of the moments about of the forces whose magnitudes are 5 N and 18 N.

**Q7: **

is an isosceles triangle in which and . Forces of 20, 17, and newtons are acting on , , and , respectively. Find the sum of the moments of the forces about the midpoint of , given that the positive direction is .

**Q9: **

is an equilateral triangle, having a side length of 4 cm. Knowing that forces of magnitudes 150 N, 400 N, and 50 N are acting as shown in the figure, determine the sum of the moments of these forces about the point of intersection of the triangleβs medians, rounded to two decimal places.

**Q10: **

is a rhombus having a side length 2 cm in which . Forces of magnitudes 2 N, 6 N, 2 N, N, and 4 N are acting along , , , , and , respectively. If the sum of the moments of these forces about equals the sum of moments of the forces about the point of intersection of the two diagonals of the rhombus, find .