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Work formula

Work = force × distance

Earth's gravity

Work is lifting a load against _______

How quickly work gets done

Power is _______

Energy

(physics) the capacity of a physical system to do work

Power formula

Power= work done/time interval (P=w/t)

Watt (W)

SI unit Power

Kilowatt (1,000 watts)

kW is the abbreviation for a _______

Megawatt (1,000,000 watts)

MW is the abbreviation for a _______

Potential Energy

(mass) x (g) x (height)

kinetic energy

a running dog

Kinetic energy formula

KE= 1/2 mass x speed squared (1/2mv^2)

Potential energy formula

PE= mass x gravity x height

GPE=weight x height

Gravitational potential energy formula

work-energy theorem

The energy associated with the work done by the net force does not disappear after the net force is removed (or becomes zero), it is transformed into the Kinetic Energy of the body.

Conservation of Energy

Energy cannot be created or destroyed; it may be transformed from one form into another, but the total amount of energy never changes

Efficiency

_______ compares the amount of output work to the input work.

Efficiency formula

Efficiency= work done/energy used

The sun

The source of almost all energy on Earth

combustion

a process in which a substance reacts with oxygen to give heat and light

Tangential velocity

A velocity parallel to the Earth's surface

pulls

Everything _______ on everything else

Law of Universal Gravitation

a force of gravity that's acts on all objects in the universe

Law of universal gravitation in simpler terms

Everything pulls on everything else with an equal force

Inverse-square law

The intensity of light gets less as the inverse square of the distance

greater; less

The _______ the distance from the Earth's center the _______ the gravitational force on an object

Universal gravitational equation

F= G (mass1 x mass2/ distance squared)

Universal Gravitational Constant

F=g(m1m2/r^2) G = 6.67 E-11 N m² / kg²

Gravitational pulls

Ocean tides are the result of differences in _______

Spring tides

Tides that occur when the Sun, Earth, and Moon are all lined; High tides are higher than average and low tides are lower than average

Neap tides

a tide that occurs when the moon is halfway between a new moon and a full moon, in either direction; the tides due to the sun and the moon partly cancel, so that the …

The Big Bang

The explosion of a primordial fireball some 8 to 15 billion years ago which created the universe

Dark matter

Mysterious, invisible matter unlike the matter we know

The Big Crunch

The contraction of the universe, estimated to happen in 100 billion years

Machines

Devices to multiply forces

Work input=

Work output