inertia
what is inertia?
the fundamental property of matter that causes it to resist any change in its state of motion
what is the relationship between force, mass, and acceleration according to newtons second law?
force equals mass times acceleration
when a rocket launches, what provides the reaction force that propels it upward?
the exhaust gases
how does the force of gravity between two objects change if the distance between them is doubled?
it decreases to one-quarter of the original force
what happens to an objects motion when balanced forces act on it?
the objects stays on rest or continues moving at a constant velocity
which has more inertia? :a bowling ball or a basketball
the bowling ball
if a net force of 10 N is applied to an object with a mass of 2 kg, what is the objects acceleration?
5 m/s
if a person jumps off a boat into a shore what happens to the boat according to newtons third law?
the boat moves in the opposite direction
what is the primary difference between static friction and kinetic friction?
what is the result of unbalanced forces acting on a object?
the object accelerates
how does inertia relate to newtons 1st law of motion
Newton's First Law of Motion ("law of inertia")objects at rest stay at rest, and objects in motion stay in motion at a constant velocity
how does increasing the mass of an object affect its acceleration if the applied force remains constant?
the acceleration decreases
a book is sitting on a table, what is the reaction force to the weight of the book?
the normal force from the table acting upwards on the book
explain how gravity and friction both affect the motion of a sled going downhill
gravity accelerates the sled downhill, while friction opposes the motion slowing it down
give an example of balanced forces acting on an object
a book resting on a table
what happens to a passenger in a car when the car suddenly stops?
due to inertia the passenger will keep moving forward when the car stops
if an object is moving at a constant velocity, what can you conclude about the net force acting on it?
the net force is 0
if you push against a wall, what's the action force and what is the reaction force
action force: you pushing
reaction force: the wall
how does the coefficient of friction affect the amount of fractional force between two surfaces
a higher coefficient of friction results in a greater frictional force
if an object is accelerating are the forces acting on it balanced or unbalanced?
balanced
why is it harder to move a heavier box verses a lighter one?
a heavy box has a heavier
that is the acceleration of an object in free fall near the Earth's surface, neglecting air resistance?
approximately 98 m/s
why don't reaction and action forces cancel each other out?
they act on different objects
if an object slides down a ramp at the same speed, how does gravity compare to friction
the component of gracity parallel to the plane is equal to the force of friction
what does it mean for forces to be balanced?
the net force is at 0