Newton's Second Law of Motion
(5) Newton's second law of motion
- Newton's First law of Motion qualitatively defines the concept of force and the principle of inertia
- For an body at rest, application of force causes a changed in its existing state and application of force on a body moving with uniform velocity would
give the body under consideration as acceleration
- Newton's second law of motion is a relation between force and acceleration
- Newton's second law of motion says that
" The net force on a body is equal to the product of mass and acceleration of the body"
Where Fnet is the vector sum of all the forces acting on the body
- Above equation -(1) can be resolved along x,y and z components .Thus in component form
- Component of acceleration along a given axis is caused only by the net component of force along that axis only not by the components of force along other
- Newton's second law of motion is completely consistent with newton first law of motion as from equation (1) F=0 implies that a=0
- For a body moving under the influence of force, acceleration at any instant is determined by the force at that instant not by the previous motion of the
- Newton's second law of motion is strictly applicable to a single particle .In case of rigid bodies or system of particles, it refers to total external
forces acting on the system excluding the internal forces in the system.
link to this page by copying the following text