TOPIC::Mechanic s: => *Weight (force of gravity) decreases as you move away from the earth by distance squared. *Mass and inertia are the same thing. *Constant velocity and zero velocity means the net force is zero and acceleration is zero. *Weight (in newtons) is mass x acceleration (w = mg). Mass is not weight!. *Velocity, displacement [s], momentum, force and acceleration are vectors. *Speed, distance [d], time, and energy (joules) are scalar quantities. *The slope of the velocity-time graph is acceleration. *At zero (0) degrees two vectors have a resultant equal to their sum. At 180 degrees two vectorshave a resultant equal to their difference. From the difference to the sum is the total range of possible resultants. *Centripetal force and centripetal acceleration vectors are toward the center of the circle- while thevelocity vector is tangent to the circle. *An unbalanced force (object not in equilibrium) must produce acceleration. *The slope of the distance-tine graph is velocity. *The equilibrant force is equal in magnitude but opposite in direction to the resultant vector. *Momentum is conserved in all collision systems. *Magnitude is a term use to state how large a vector quantity is.
Posted on: Wed, 05 Jun 2013 08:03:28 +0000