it states "if two force, which act simultaneously on a particle be represented in ma
it is applicable to two forces only
The parallelogram law of forces says that the sum of two forces is equivalent to the parallelogram formed by placing the first vector as starting from the origin and the second starting from the head of the first. This can be proven through trigonometric derivation of triangle angles and sides.
it is applicable to two forces only
The parallelogram law states that when two concurrent forces F1 &F2 acting on a body are represented by two adjacent sides of a parallelogram the diagonal passing through their point of concurrency represents the resultant force R in magnitude and direction
How it is related is given in the following link: http://blog.oureducation.in/to-verify-the-law-of-parallelogram-of-forces/
The parallelogram law of forces can be applied to any situation where multiple forces are acting on an object. The launching of a stunt person from a cannon in a circus is a prime example. To achieve a certain angle of launch with a certain velocity, an initial velocity must be applied to the person, but countering that is the force of gravity. So, the initial velocity is one leg of the parallelogram and the other leg is the force of gravity.
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"If two vector quantities are represented by two adjacent sides or a parallelogram then the diagonal of parallelogram will be equal to the resultant of these two vectors."
The parallelogram law of vectors states that if two vectors are represented by the sides of a parallelogram, then the diagonal of the parallelogram passing through the point of intersection of the two vectors represents the resultant vector. This means that the sum of the two vectors is equivalent to the diagonal vector.
Balanced forces keep object in its state of motion (moving or at stop). An objects state of motion can be altered when it is subjected to an unbalanced force. This reflects Newtons first law of motion.
No, the law of applied forces does not state that a body's change in mass is proportional to the amount of force applied to it. The law of applied forces states that the force applied to a body is equal to the mass of the body multiplied by the acceleration of the body. So, if the acceleration of a body increases, the force applied to it will also increase, but the mass of the body will remain the same.