INTRODUCTION/ DEFINITIONS:
Push or pull on an object is called force. Inertia is the tendency to do nothing or to remain unchanged.
Frictional force is that force that always opposes the motion of an object. A natural disposition to move in a particular direction or manner is called tendency .
Two or more objects coming together in direct contact will be called a collision. The ability of not being affected can be termed as resistance.
Friction is the resistance of motion of a moving body. Changes in the position over time is called as motion. Momentum = Product of mass and velocity.
The rate at which the object changes its position is called as velocity. If the resultant force is zero then the forces are said to be balanced
If the external force on a system is zero the momentum remains zero. The object at rest will continue to remain in rest unless acted upon by some unbalanced force. Rate of change of velocity with respect to time is called acceleration.
It is a common observation that when a body A exerts some force on another body B, then body B also exerts some force on body
The force with which the football is kicked by the foot of the player is known as action. Due to this action force, the football moves forward. On the other hand, the force exerted by the football on the foot of the player is known as reaction
According to Newton’s first law of motion, no net external force is needed to move an object with constant velocity. So an object travels with a constant velocity (non-zero) when it experiences a net zero external unbalanced force
Change in momentum = Initial momentum – Final momentum = m(u – v).