vocab
acceleration
a vehicles capacity to gain speed with in a short period of time
Speed
Speed is the rate of change of position of an object in any direction.
force
the push or pull on an object with mass causing its velocity to change
kinetic energy and potenial energy
Kineic energy is the energy of motion. Potential energy is stored energy of an object
Power
Work done in unit time
Collision
an instance of one moving object or person striking violently against another
Vector
A quanity or phenomeron independent properties, magnitude and direction
friction
force that resists the sliding or rolling of one solid object over another
Mass and weight
Mass is a fundamental property of all matter. Weight is force that acts at all times on all objects near earth.
Pressure
The amount of force applied perpindicular to the surface of an object per unit
displacement
a vector whose length is the shortest distance from the initial point to the final position
Watt
Standard unit of power (energy per unit time)
gravity
a force that exists among all material objects in the universe
Momentum
product of the mass of a particle and its velocity
Scalar
a physical quanity that is completely described by its magnitude
energy
the capacity for doing work
Velocity
Velocity is the distance covered by an object in unit time.
impulse
a term that qualifies the overall effect of a force acting over time
Newton
unit of force
Second law of motion is the changes that a force can produce on the motion of a body. The thrid law of motion is, for every actio in nature there is an equal and opposite reaction
Newtons first law of motion
a object at rest stays at rest, an object at rest stays at rest at constant speed
Work
measure of energy transfer that occurs when an object is moved over a distnace by an external force at least part of which is applied in the direction of the displacement
joule
unit of work or energy in the international system of units
Pascal
The unit of pressure or stress
Simple machine
Several devices with few or no moving parts that are used to modify motion and the magnitude of a force in order to work