enwtons laws Flashcards
what is inertia?
Inertia is a resistance to a change in motion. Objects with greater mass have greater inertia, so a greater resultant force will be required to change its motion.
do balanced forces change the motion of an object
Balanced forces do not change the motion of an object. This means when forces are balanced:
a stationary object will remain stationary
a moving object will continue to move at the same velocity.
what is newtons first law of motion
Newton’s first law of motion states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external resultant force.
what do balanced forces do to each other
they cancel each other out
do unbalanced forces do to
cause an unbalanced force
t is terminal velocity
the object moves at a steady speed in a constant direction because the resultant force acting on it is zero.
what is newtons second law of motion
it is described ass an equation f=ma f=resultant force ,m=mass,a=acceleration
what can newtons second law be stated as
The acceleration of an object is directly proportional to the resultant force and inversely proportional to the mass of the object.
happens when a resultant force acts on an object
cause it to accelerate
what is weight
weight is the force of gravity acting on an object. It is measured in Newtons (N)
what is mass
Mass is the amount of matter in an object. It is measured in kilograms (kg).
equation for weight
weight (N) = mass (kg) x gravitational field strength (N/kg)
at is the gravitational field strength on earth
On Earth, the gravitational field strength is approximately 10 N/kg. This means that on the surface of the Earth, an object of mass 1 kg has a weight of approximately 10 N.
what is newtons third law
when body a exerts a force on body b body will exert an equal and opposite force to body a
do we know if a force is moving up
if it is positive
