Cox Physical Science Chapter 3 Force and Motion

33 terms · Some of these are fill in the blank so make sure you have the cards facing the right way

Speed

distance travelled per unit time

Acceleration

a rate of change of velocity, the unit is m/s², a = f • m

Newton's First Law

an object at rest will stay at rest, an object that is moving will stay moving unless disturbed by an unbalenced force.

Newton's Second Law

f=ma, , the net force of an object is equal to the product of it's acceleration and mass, acceleration equals net force divided by mass

Newton's Third Law

for every action there is an equal and opposite reaction

kinetic energy

the energy a moving object has because of its motion

potential energy

stored energy due to position

elastic potential energy

energy stored by something that can stretch or compress

chemical potential energy

energy stored in chemical bonds

gravitational potential energy

energy stored by objects due to their position above Earth's suface

mechanical energy

the total amount of potential and kinetic energy in a system

Law of Conservation of Energy

the law that states energy cannot be created or destroyed

fission

the splitting of atoms which releases tremendous amounts of energy and is used to start the chain reaction of an atomic explosion

gravity

a force of attraction between objects that is due to their masses, 9.8

force

a push or pull exerted on an object.

motion

The state in which one object's distance from another is changing.

acceleration

an object will have a greater _________________ if a greater force is applied to it

mass

The ___________ of an object and the force applied to it affects acceleration

friction

the force that opposes the motion of one surface as it moves across another surface, force that opposes motion between two surfaces that are touching each other

microwelds

areas where surface bumpers stick together, are the source of friction

static friction

friction between two surfaces that are not moving past each other

kinetic friction

force that opposes the motion of two surfaces sliding past each other

rolling friction

friction between a rolling object and the surface its rolling on

air resistance

opposes the motion of objects that move through the air

shape, size, speed

The amount of air resistance depends on an objects _______, ________, and _________

Law of Gravitation

any two masses exert an attractive force on each other

gravitational force

one of the four basic forces that also include electromagnetic force, the strong nuclear force, and the weak nuclear force

fundamental

Gravity is a _____________ force that gives the universe its structure

acceleration of gravity

all objects will fall with the same acceleration regardless of mass

decreases

Weight _____________ as an object moves away from Earth

projectile

have horizontal and vertical velocities due to gravity, and follow a curved path

centripetal acceleration

acceleration toward the center of a curved path, caused by centripetal force, and unbalanced force

centripetal force

any force that causes an object to move in a circular path