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57 terms

speed measurement are given in units of

distance/time

measurements of acceleration are given in units of

distance/time2

how many centimeters are in a kilometer

100,000

It can be important to know about the velocity of an object , not just its speed, because

velocity also tells direction

Friction acts in a direction BLANK to the direction of an objects motion.

opposite

Unless an object at rest is acted upon by another force, it stays at rest due to its

inertia

an BLANK can cause an objects motion to change

unbalanced force

The amount of matter in an object is called

mass

Newtons second law of motion states the relationship of mass ,acceleration,and force. it says that

force equals acceleration divided by mass

An BLANK causes objects to move in a circle

centripetal

The unit of force, a newton, is equal to

kj x m/s

An object in free fall BLANK until it reaches terminal velocity

accelerates

Potential energy is energy

that is stored

Kinetic energy depends on

mass and velocity

The suns energy comes from

electromagnetic energy

Sunlight is a form of

electromagnetic energy

An electric blanket transform electric energy to

thermal energy

The formula wieght x height is used to calculate

elastic potential energy

The energy stored in the nucleus of an atom is called

nuclear energy

The distance anobject travels per unit of time

speed

The steepness of a line on the graph

slope

The rate at which velocity changes

acceleration

speed given in a direction

velocity

The basic SI unit of length

meter

A place or object used ofr comparison to determine in an object is in motion

reference point

The speed of an object at one instant of time

instantanious speed

A system of measurement based on multiples of ten and on established measures of mass,length, and time

Internation system of units

The overall rate at which an object moves ; calculated by dividing the total distance an object travelsby the total time .

average speed

friction

The force that one surface exerts on another when two surfaces rub against eachother

The force that pulls objects toward each other

gravity

A push or pull exerted on an object

force

A fluid friction experienced by objects falling through the air

air resistance

The greatest velocity a falling object can acheive.

terminal velocity

Friction that acts on objects that are not moving

static friction

Forces that produce a nonzero net force , which changes an object's motion .

unbalanced forces

A unit of measure that equals the force required to accelerate1 kilogram of mass at 1 meter per second

Newton

The rule that in the absence of outside forces the total momentum of objects that interact does not change.

Law of conversation

An object that is trown

projectile

The overall force on an object when all the idividual forces acting on it are added together.

net force

Friction that occurs as an object moves through a fluid

fluid friction

The amount of matter in an object

mass

Friction that occurs when one solid surface slides over another

sliding friction

The product of an objects mass and velocity

momentum

The force of gravity on an object at the surface of the planet

weight

Equal forces acting on an object in opposite directions

balanced forces

The ability to do work or cause change

energy

The potential energy stored in chemical bonds

chemical energy

The energy of stretched or compressed objects

elastic potential energy

The total potential and kinetic energy of the particles in an object

thermal energy

Energy that an object has due to its motion

kinetic energy

The energy of electric charges

electrical energy

The energy of electric charges

electrical energy

The energy of light and other forms of radiation

electromagnetic energy

The potential energy stored in a nucleus of an atom

nucleur energy

Kinetic or potential energy asssociated with the motion or position of an object.

mechanical energy

potential energy that depends on the height of an object

gravitational potential energy

Stored energy thata results from the position or shape of an object.

potential energy