13 terms

Motion and Design Vocabulary #1

STUDY
PLAY
position
the location of an object
speed
a measurement of distance over time
force
a push or pull on an object
energy
the capacity to do work it can be used to move muscles, operate machines, cook meals and heat rooms
machine
something that replaces human effort
gravity
the force that pulls things toward Earth
balanced forces
forces that have a net force of zero (equal force in opposite directions)
unbalanced forces
forces that have a net zero force that is not zero (causes motion)
inertia
the tendency of an object to remain at rest or in motion unless it is acted on by a force
momentum
the product of the mass and velocity of an object
friction
the force that acts on an object to stop motion
Machine
a tool that makes work easier: it has few or no moving parts
Engineer
trained person who designs or builds