a property of matter by which something that is not moving remains still and something that is moving goes at the same speed and in the same direction until another thing or force affects it

a science that deals with physical energy and forces and their effect on objects

the rate at which the speed of a moving object changes over time

the quantity of matter in something

quickness of motion

of or relating to energy, motion, or physical force

an advanced branch of mathematics that deals mostly with rates of change and with finding lengths, areas, and volumes

an ancient weapon used for throwing large rocks

having or relating to the sun as the center

a force that causes something to rotate

of or relating to the movement of physical objects

in physics, it is the force of gravity on an object

an idea or theory that is not proven but that leads to further study or discussion

something that changes or that can be changed

something that is unusual or unexpected

a force that slows down a moving object by going against the direction in which the object is moving

the science that studies light and the way it affects and is affected by other things

the natural force that causes things to fall towards the earth

the practice of basing ideas and theories on testing and experience