chap 3 fm Flashcards
(17 cards)
what is inertia
the resistance to a change in motion, the tendincy for an object to remain at rest
in terms of inertia compare a car in motion to a car at rest
the car at rest will stay in rest and the car in motion will stay in motion unless affected by an outside force
What is newtons first law
objects at rest tend to remain at rest an objects in motion tend to remain in motion traveling in a constant speed and in the same direction unless another force acts upon it
if you bump into a table with a glass vase on it the vase will move toward you why
because the top of the vase wants to stay in rest but the bottom is moving with the table
in a head on collision of two cars a passenger will move forward then backward why
because your body wants to move with the car but the airbag/seatbelt will stop you from moving forward and crashing into something
what are some other discoveries newton made
the difference between light and color, a form of math called calculus, and gravitation
what is newtons second law
an object begins to move, speed up, slow down, comes to a stop, or changes direction only when a force acts upon it
when force is applied to an object what determines the objects acceleration
the amount of force applied and the mass of the object
when equal forces are applied to an object as the mass of the object increases what happens to the objects acceleration
it slows down
in order to have various objects accelerate at the same rate as the mass of an object increases the force applied has to be
stronger/increase
with objects of equal mass as the force applied to the increases what affect does that have on then acceleration
it speeds up
how does friction help the movement of a car and how does it hinder the movement of a car
friction helps the movement of a car by getting a grip on the tires it hinders by stoping the car
what factors determine the amount of friction between two objects
the properties of each surface, type of motion, rolling produce less friction than sliding
what are ways friction can be reduced
lubricants and wheels
what is produced as a result between objects
heat
compare the soles in a bowling shoe and the soles in basketball shoes
the soles in bowling shoes are used reduce friction and the soles in basketball shoes are used two increase friction.
list things that would be impossible to do without friction
flying, driving, and walking
