the same as its potential energy at that point

negligible

about 60 MJ

more than 60 MJ

25 centimeters

45 centimeters

50 centimeters

100 centimeters

40%.

50%.

60%.

140%.

automobile

living cell

machine

all of these

solar and nuclear

gasoline and fuel cells.

wind and tidal

potential energy and kinetic energy

 60 N × 4 m = 240 J

60 x 32 = 1920

4 m x 32kg = 128 kg/m

60N / 4m = 15 n/m

Work is done when a net force acts on an object

the object moves in the direction of the net force. 

when energy is being transferred from one place to another or transformed from one form to another

We observe the effects of energy when something is happening

force x distance = work

force x acceleration = work

push x pull =work

effort x monster = my work

the rate (time interval) at which work is done.

work x distance

force x distance

F=ma

The forklift that delivers twice the power will lift twice the load in the same time, or the same load in half the time.

it doesn't, it operates at the same speed

up to four times faster

Power equals the amount of work done divided by the time interval during which the work is done. 

P = w x f

power equals the amount of work done multiplied by the time interval during which the work is done

P = m x a

kinetic energy and potential energy. 

gravitational energy and thermal energy

chemical energy and biological energy

gas and the force

the energy due to the position of something or the movement of something. 

The property of an object or system that enables it to do work 

the rate at which work is done.

Some work is done to change the speed of an object. 

elastic potential energy, chemical energy, and gravitational potential energy. 

mechanical, fossil fuels, and thermal energy

the force, the pacific ocean, and the hulk

thermal potential energy

gravitational potential energy

mechanical energy

elastic potential energy 

The kinetic energy of a moving object is equal to the work required to bring it to its speed from rest, or the work the object can do while being brought to rest. 

 Energy that is stored and held in readiness 

It can be transformed from one form into another, but the total amount of energy never changes

transfers energy from one place to another or transforms it from one form to another. 

energy cannot be created or destroyed. It can be transformed from one form into another, but the total amount of energy never changes. 

a moving object is equal to the work required to bring it to its speed from rest, or the work the object can do while being brought to rest. 

the energy due to the position of something or the movement of something. 

the rate (time interval) at which work is done

transfers energy from one place to another or transforms it from one form to another

is the ratio of useful energy output to total energy input

some energy is transformed into atomic or molecular kinetic energy 

a moving object is equal to the work required to bring it to its speed from rest, or the work the object can do while being brought to rest. 

states that whenever work is done, energy changes. 

states that energy is created, work is done

says that work and energy are the same

requires work to be created in order for energy to be changed.

carbon dioxide.

our bodies

the sun

the force

Because wasted energy is dissipated as heat.

a small fraction of input energy is converted into thermal energy. 

efficiency is about making heat

due to inventors not being smarter

Efficiency

Work

Power

Machines