Transcript Forces, Motion, and Machines - Center Grove Elementary School

FORCES, MOTION, AND MACHINES
A
push or pull that is
applied to an object
FORCE
The
force that pulls
objects toward the center
of the Earth
GRAVITY
Going
from one place to
another
MOTION

a bus, train, and airplane are in motion when
they move from one place to another
A
force that stops motion
and happens between
two surfaces that touch
FRICTION

It is easier to walk on a dry surface than it is on
ice
A
lifting or raising force
LIFT

A kite depends on the wind to act as its lift.
Resistance
by friction
from air or water moving
over a surface
DRAG

Boats and planes are narrow. As they move,
friction holds them back from moving faster.
A
reaction force that
pushes objects forward
THRUST

Airplanes, rockets, motor boats use thrust to
move
A
change in speed,
direction, or both
ACCELERATION
The
speed and direction
of moving objects
VELOCITY