science 9 4th quarter

• speed of an object in a particular direction is called velocity
• UAM - uniformly accelerated motion
• Acceleration - mathematically defined as the rate of change in vrelocity overtime
• • symbols = a - acceleration
• vf = final velocity
• vo(vi) = initial velocity
• at = change of time
• rest = means that the initial velocity is zero
• UAM - means a constan or a steady acceleration
• FFM - free fall motion
• galileo - proposed a contrasting idea about the free fall motion
• galileo galilei - is an italian physicist and astronomer who has wide range contribution to science
• discovery of four of jupiters moon
• he used an inclined plane
• negative = downward and is negative
• positive = upward and is positive
• air resistance - sometimes referred to as air friction
• air resistance - fictional force that opposes the motion of a falling object
• astronaut david scott - performed an experiment that was done on the moon during the end of the last apollo 15 moonwalk last august 2, 1971
• projectile motion - an object that is initially thrown into the air
• momentum - is also a vector quantity with magnitude and direction
• inertia - tendency of an object at rest to remain at rest or an object moving at a certain speed to continue doing so unless acted upon by an unbalanced force
• conservation of momentum - when two objects collide, their total momentum remains constant
• newtons law of inertia - defines what happens to the motion of a body when force is absent in the body
• linear momentum - a measure of difficulty encountered in bringing an object to rest
• formulas= D - displacement
• formula= a - acceleration
• p = momentum
• m and v= mass and velocity