Newton's Law of Motion Flashcards
Meaning of force
a push or pull of an object with mass that can change its velocity
SI Unit of force
kgm/s² or N (Newton)
Meaning of weight
force exerted on an object by gravity
Formula & SI Unit of weight
W=mg, kgm/s² or N (Newton)
What is the statement of Newton’s First Law of Motion?
every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by an action of an external force
Newton’s First Law of Motion also known as……….
Law of Inertia
Meaning of Inertia
the tendency for an object to continue its motion in the absence of a force
What happen if ΣF = 0?
V will become constant & A is zero
The relationship in Inertia
The larger the mass, the greater the Inertia
What is the statement of Newton’s First Law of Motion?
i) net force = mass x acceleration
ii) acceleration is proportional to force & inversely proportional to mass
The formula of Newton’s Second Law of Motion
ΣF=ma
What is the statement of Newton’s Third Law of Motion?
every action (force) has a reaction force that is equal in magnitude but opposite direction
The concept of Newton’s Third Law of Motion
F(ab) = -F(ba)
Types of Force
i) Gravitational force, g (weight)
ii) Frictional force, f
iii) Normal force, N
iv) Tensional force, T
Meaning of frictional force, f?
- a force that oppose the motion, exerted due to rough surface
- opposite direction of motion
