Frequently Asked Questions
Force is a push or pull on an object that can change its state of motion or shape.
Balanced forces are equal in magnitude and opposite in direction, producing no change in motion.
Unbalanced forces cause a change in the state of motion or shape of an object.
Sir Isaac Newton formulated the three laws of motion.
An object remains at rest or in uniform motion unless acted upon by an unbalanced external force.
Inertia is the tendency of an object to resist any change in its state of motion or rest.
The rate of change of momentum is directly proportional to the applied force and occurs in its direction.
For every action, there is an equal and opposite reaction.
Momentum is the product of an object’s mass and velocity, given byp=m×vp = m \times vp=m×v.
The SI unit of force is the newton (N).
The SI unit of momentum is kg·m/s.
One newton is the force that produces an acceleration of 1 m/s² in an object of mass 1 kg.
F=m×aF = m \times aF=m×a— whereFFFis force,mmmis mass, andaaais acceleration.
Acceleration depends directly on the applied force and inversely on the object’s mass.
Due to inertia, the passenger's body resists the forward motion.