Selina ICSE Solutions for Class 10 Physics Chapter 1 Force Exercise 1(A) Solution 1. (a) When the body is free to move it produces translational motion. (b) When the body is pivoted at a point, it produces rotational motion. Solution 2. The moment of force is equal to the product of the magnitude of the force and the perpendicular distance of the line of action of force from the axis of rotation. S.I. unit of moment of force is Newton metre (Nm). Solution 3. Moment of a force is a vector. Solution 4. Moment of force about a point depends on the following two factors: The magnitude of the force applied and, The distance of line of action of the force from the axis of rotation. Solution 5. When the body is pivoted at a point, the force applied on the body at a suitable point rotates the body about the axis passing through the pivoted point. The direction of...
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