25 terms

# Water Bottle Rocket Vocabulary

#### Terms in this set (...)

drag
a force that works against forward motion; friction between the air and the object in motion; air resistance
friction
The force that two surfaces exert on each other when they rub against each other
force
a push or a pull exerted on an object
balanced forces
forces that are equal and working in opposite direction; these forces do not cause a change in an object's motion
unbalanced forces
forces that cause a change in an object's motion to change direction, speed up, slow down, or stop; the forces are not equal
gravity
The attractive force between objects
inertia
the property of matter that causes matter (objects) to resist any change in its motion in either direction or speed; laziness
thrust
a force that is used to push our rockets off the launcher; a pushing force
action force
a force that acts on an object
reaction force
a force that is equal and opposite of the action force
motion
The state in which one object's distance from another object is changing.
variable
any part of an experiment that can be changed; Examples: amount of water, number of fins, amount of mass in the nose cone
Newton's 1st law
(Law of Inertia) an object in motion tends to stay in motion & an object at rest stays at rest unless acted upon by an outside force.
Newton's 2nd law
The acceleration of an object depends on the mass of the object and the amount of force applied
Newton's 3rd law
For every action there is an equal and opposite reaction
Projectile motion
the curved path that an object follows when thrown, launched, or otherwise projected near the surface of Earth
Fins
The stabilizing and guiding unit of a model rocket.
distance/time
What is the formula for speed?
velocity
calculated using the speed formula, but includes a reference direction
acceleration
a change in motion; speeding up, slowing down, or changing direction.
unbalanced force
Produces a change in motion; the net force is NOT zero
momentum
The product of an object's mass and velocity
constant
A value that does not change
compressed
Squeezed together
weight
A measure of the gravitational force exerted on an object.