chapter 1 vocab Flashcards
the rate at which velocity changes with time; the change in velocity may be in magnitude, direction, or both, and it’s usually measured in units of m/s^2
acceleration
the force of friction acting on an object due to its motion in air
air resistance
the vector sum of forces acting on an object that is not accelerating equals 0
equilibrium rule
a push or pull
force
falling under the influence of gravity alone— falling without air resistance
free fall
the resistive force that opposes the motion or attempted motion of an object past another object with which it is in contrast, or through a fluid
friction
the time that one’s feet are off the ground during a vertical jump
hang time
the property by which objects resist change in motion
inertia
the unit of mass
kilogram
the quantity of matter in an object
mass
the combination of all forces that act on an object
net force
the scientific unit of force
newton
distance traveled per unit time
speed
the force that supports an object against gravity, often called the normal force
support force
an arrow that represents the magnitude and direction of a quantity
vector
