A
The force that opposes motion between two surfaces in contact
friction
A pulling or stretching force
tensile force
Which of the following is a contact force? Gravity, Magnetism, Friction, Electrostatic force
Friction
"Pushes on an object and squeezes it" defines what type of force?
Compressional
The combination of all forces acting on an object is the ___________________________.
net force
The constant velocity reached when air resistance equals gravitational force
terminal velocity
The tendency of an object to resist changes in motion
inertia
The four fundamental forces of nature are:
Strong nuclear, weak nuclear, electromagnetic, gravitational
Projectile motion follows a path that is:
curved
The rate at which velocity changes is called ___________________________
acceleration
The upward force that allows aircraft to fly
Lift
An object or location used to determine if something is moving
reference point
When forces on a moving object become balanced, what happens to the object?
The object remains at constant velocity or at rest
What is the difference between speed and velocity?
Velocity includes direction, speed does not
The law of _________________________________ states that the total momentum before a collision equals the total momentum after a collision.
conservation of momentum
The force that acts toward the center of a circular path
centripetal force
The product of an object's mass and velocity
momentum
If you push on a wall with a force of 50 N, the wall pushes back on you with how much force?
50N
Pressure decreases as fluid velocity increases defines what principle?
Bernoulli's principle
When forces are ________________________, an object will accelerate or change motion.
unbalanced
The force that opposes motion through a fluid or the air
drag
The force that pushes an object forward, especially in flight
thrust
Pressure applied to a fluid is transmitted equally throughout the fluid is the definition of what principle?
Pascal's Principle
What is Newton's First Law of Motion?
An object at rest stays at rest unless acted upon by an unbalanced force
Is the change in velocity of an object traveling in a circular path.
centripetal acceleration