Newton’s Second Law of Motion
The net force on a body is equal to the product of the body’s mass and the acceleration of the body.
Force is an interaction that can cause deformation and/or change of motion of an object. Any push or pull is a force.Force is a vector i.e. direction of force is in which it is applied
The SI unit of force is the Newton (1 N = 1 kg-m/s2)
Concept of force is derived from Newton’s law of motions.
Various types of Forces
|Gravitational Force||The force exerted by the Earth on an object is the gravitational force ( F) The magnitude of the gravitational force is called the weight of the object(W)|
|Frictional Force||If we slide or attempt to slide a body over a surface, the motion is resisted by a bonding between the body and the surface. The resistence is considered to be a single force called the frictional force.|
|Tension Force||The tension force is the force that is transmitted through a string, rope, cable or wire when it is pulled tight by forces acting from opposite ends.|
Formula used for Force calculation is:
Force(N)[F] = Mass(Kg)[m] * Acceleration(m/s2)[a]
A person with a mass of 65 kg is accelerated to 2 m/s2. How much force was applied to him?
F = 65(kg) * 2(m/s2)
F = 130 N
S.I. unit of Force is Newton i.e. (Kgm/s2)
Below is the conversion chart of various other units of Force