if resultant force acting on an object is not 0, we say forces on the object are unbalanced.
Forces acting on book are balanced ⇒ and it moves at constant velocity.
if applied force F ⇒ is now increased ⇒ forces that act on the book ⇒ no longer balanced ⇒ and book accelerates.
If applied force F is removed ⇒ while book is still in motion → friction is the resultant force. Resultant force ⇒ causes book to decelerate and eventually stop .
Law
Newtons second law states that when a resultant force acts on an object of a constant mass, the object will accelerate in the direction of the resultant force. #PhysicsDefinitions
Product of mass and acceleration of object gives resultant force. F = resultant force (N) m = mass of object (Kg) a = acceleration of object () #physicsFormulae
- resultant force F of an object ⇒ produces an acceleration, a
- Doubling the resultant force F of an object doubles its acceleration
- with the same resultant Force F, doubling mass m halves the acceleration, a
Force ⇒ is directly proportional to acceleration Force⇒ is inversely proportional to mass.
- inverse proportion graph is a downward curve