PHYSICS 5A Chapter Notes - Chapter 2.6, 2.7, 2.8, 3.4, 3.6: Projectile Motion
Document Summary
Prepare: picture, collect necessary information, preliminary calculations. Pictorial representation shows all the important we need to keep track of. Problem-solving strategies for motion with constant acceleration. Use the three equations: (vx)f = (vx)i +ax t, xf = xi + (vx)i t + ax (cid:523) t(cid:524)2, (vx)f2 = (vx)i2 + 2ax x. Free fall: an object that has constant acceleration because it is under the influence of gravity and no other force. Any two objects in free fall, regardless of their mass, have the same acceleration. The free-fall acceleration always points down, no matter what direction an object is moving. The magnitude of the free-fall acceleration has a special symbol g = 9. 80 m/s2. G is always positive, there is never a problem that uses a negative value for g. Ay = afreefall = -g : g is the magnitude not the acceleration, the acceleration would be negative.
