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Answers
1. According to the Principle of Transmissibility if we transmit a force in its line of action without changing its magnitude and direction then there will be no change in the effect of a force.
2. a rule for adding two vectors, as forces (parallelogram of forces ), by placing the point of application of one at the point of origin of the other and obtaining their sum by constructing the line connecting the two remaining end points, the sum being the diagonal of the parallelogram whose adjacent sides are the two ...
3. The coefficient of friction between any two surfaces in contact is defined as the ratio of the force of limiting friction and normal reaction between them. Angle with the resultant of force of limiting friction F and normal reaction R makes with the direction of normal reaction R is angle of reaction.
4. Lami's theorem states that if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two forces.
Varignon's theorem states that the torque of a resultant of two concurrent forces about any point is equal to the algebraic sum of the torques of its components about the same point.
5. Forces are due to an interaction of at least two objects. It may change the state of motion of an object. It may change the shape of an object. Forces applied on an object in the same direction add to one another and the resultant is in the same direction.
6. 1. As the two forces forming couple are equal and opposite the couple doesn't produce
translational motion.
2. When it acts on a body net resultant force acting on a body is zero.
7.The force resisting the motion of a rolling body on a surface is known as rolling friction or rolling resistance. Rolling of ball or wheel on the ground is an example of Rolling friction. The other type of friction is sliding friction. ... Pushing a box across the table is an example of Sliding friction.
8. Triangle law of vector addition states that when two vectors are represented as two sides of the triangle with the order of magnitude and direction, then the third side of the triangle represents the magnitude and direction of the resultant vector.
Answer:
1). According to the Principle of Transmissibility if we transmit a force in its line of action without changing its magnitude and direction then there will be no change in the effect of a force.
2). A rule for adding two vectors, as forces (parallelogram of forces ), by placing the point of application of one at the point of origin of the other and obtaining their sum by constructing the line connecting the two remaining end points, the sum being the diagonal of the parallelogram whose adjacent sides are the two vectors.
3). The coefficient of friction between any two surfaces in contact is defined as the ratio of the force of limiting friction and normal reaction between them. Angle with the resultant of force of limiting friction F and normal reaction R makes with the direction of normal reaction R is angle of reaction.
4). (A)- Lami’s Theorem states, “When three forces acting at a point are in equilibrium, then each force is proportional to the sine of the angle between the other two forces”.
(B)- Theorem States, “The theorem states that the torque of a resultant of two concurrent forces about any point is equal to the algebraic sum of the torques of its components about the same point”.
5). (i) Forces are due to an interaction of at least two objects.
(ii) It may change the state of motion of an object.
(iii) It may change the shape of an object.
(iv) Forces applied on an object in the same direction add to one another and the resultant is in the same direction.
6). (i) As the two forces forming couple are equal and opposite the couple doesn't produce translational motion.
(ii) When it acts on a body net resultant force acting on a body is zero.
(iii) The movement of a couple about any point in its plane is constant, both in magnitude and direction.
7). (A)- The frictional force which resists the real relative sliding motion between two contact surfaces is known as Sliding or Kinetic Friction. Ex - (i) Pushing a heavy and bigger object such as crowbar.
(ii) Movement of coins in a carom board can be cited.
(B)- Force resisting the motion of a rolling body on a surface is known as Rolling friction or Rolling resistance. Ex - Rolling of ball or wheel on the ground is an example of Rolling friction.
8). Triangle law of vector addition states that when two vectors are represented as two sides of the triangle with the order of magnitude and direction, then the third side of the triangle represents the magnitude and direction of the resultant vector.