Physics - Forces and motion: 2 Forces and shape

weight

the force of gravity acting on a body

normal reaction force

a force at 90 degrees to the surface

mass

the amount of matter in an object: the property of an object that determines how easy it is to speed up or slow down

rotate

to turn or spin about an axis

generator

a device that transfers mechanical energy to electrical energy - that is a source of electrical energy

upthrust

an upward force acting on something; an object in a liquid or gas will have an upward force acting on it called the buoyant upthrust.

nuclear

to do with the nucleus of an atom, for example, the forces that hold neutrons and protons tightly together in the nucleus is a nucleur force

resultant force

the total effect of two or more forces acting on an object: sometimes reffered to as an unbalanced force

unbalanced force

non-zero resultant force

thrust

a type of pushing force, like the thrust of rocket motors

kinetic energy

the type of energy that a moving object stores

weightless

the condition in which a body does not experience the force we call weight

compressed

squeezed into a very small space