Newton's laws of motion Flashcards
what does Newton’s first law state
it states that an object will not change its motion unless acted upon by an external unbalanced force
Newton’s first law of motion is also known as ______________
the law of inertia
what is inertia
inertia is the tendency of a object to resist changes to its motion
how does mass affect inertia
an object with more mass has more inertia than object with less mass
what is net force
net force on an object is the sum of all the forces acting upon the object
is net force a vector or scalar quantity
net force is a vector quantity so write direction even if there is no space given.
what are the two variables that an objects acceleration is dependent on
the objects mass and the net force acting on the object
what is Newton’s second law
f=ma
what is the relationship between force and acceleration in Newton’s second law
the acceleration of the object is directly proportional to the force acting on the object
force⬆️ = acceleration⬆️
force⬇️ = acceleration⬇️
what is the relationship between mass and acceleration in Newton’s second law
the acceleration of the object is indirectly proportional to the mass of the object
mass⬆️ = acceleration⬇️
mass⬇️ = acceleration⬆️
what is weight or weight force in physics
n physics, weight force is acceleration due to gravity acting on an object
what is weight force measured in
weight is a force it is measured in newtons N
what is acceleration due to gravity on Earth
it is 9.8 m/s squared
what is the weight of an object with a mass of 20kg
20kg x 9.8m/s/s196 N
what are action reaction froces
all forces occurs in pairs. this is known as action reaction forces
