first law
the tendency of an object to resist a change in motion is called _____.
Inertia
the unit for force is ____.
newtons
state newtons 3rd law
for every action there is an equal and opposite reaction
whats the strongest type of friction
static friction
a push or pull on an object is called a _____.
force
why do passengers move forward when a bus stops suddenley
inertia keeps them moving forward
write the equation for newtons 2nd law
F = m x a
when you push water backwards while swimming what happens
water pushes you forward
name the weakest form of friction
rolling friction
a rocket launch which laws applys
all three laws apply
what does newtons 1st law say about objects at rest
they stay at rest unless acted on by an unbalanced force
how does mass affect acceleration for the same force
greater mass equals less acceleration
a rocket moves upward because ____.
it pushes exaust gases downward
name the two variations of fluid friction
water and air resistance
in soccer when a ball bounces off a wall which law is seen
third law
if net force is zero what is true about the motion
it stays at rest or moves at constant velocity
a 27kg object accelerates at 3 m/s squared what is the net force
81N
why does a balloon fly around when released
air rushes out pushing the balloon in the opposite direction
what kind of friction is applied to a soccer ball when kicked on grass
rolling
what force or forces are acting on a ball that has been thrown into the air
gravity and fluid friction (air resistance)
an object moving at constant velocity will continue moving unless ____.
acted on by an unbalanced force
find the acceleration of an object that has a mass of 52kg and a force of 19N
2.7368 m/s squared
what is the action force when you walk forward
your foot pushes backward on the ground
when a hockey puck slides until friction stops it. which law and kind of friction applies
first law and kinetic friction
state the first law in its entirety
an object at rest will stay at rest unless acted upon by an outside unbalanced force. an object in motion will stay in motion unless acted on by an outside unbalanced force