Question

what is force

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Answer 1

In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity.

Answer 2

Answer:

Force is an influence that changes the motion of a body.  It is like a push or pull.

It makes a body with mass to alter its state of rest (inertia) or of uniform motion in a direction.  A force acts on a body through a contact or through a field in space. 

Forces are of two types :- 

1. Contact forces  

       Friction,  normal force,  Tension in a string or rod, spring (restoration) force, applied force (push or pull), air resistance of drag,  buoyancy force in a fluid

2. Distant forces or non-contact forces

       Electric force of attraction,  nuclear forces, magnetic force of attraction or repulsion, gravitational force of attraction.

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