1. Which object - the elephant or the feather - will hit the ground first?  The elephant encounters a smaller force of air resistance than the feather and therefore falls faster.  The elephant has a greater acceleration (change in velocity) due to gravity than the feather and therefore falls faster.  Both elephant and feather have the same force of gravity, yet the feather experiences a greater air resistance.  The feather has a smaller force of gravity so friction equals the force of gravity sooner causing a net force of zero (no acceleration); whereas the elephant has a net force that is not zero and will continue to speed up. True or false:

3. 5 N 50 N Terminal Velocity  Net force on each object = ma  Weight stays the same, but F f...  Net force decreases, acceleration...  Terminal velocity occurs when net force...  Less massive objects reach terminal velocity first because...  More massive objects will have a ________ terminal velocity and hit the ground________.

4. Watch several times noting the change in the acceleration as he falls and opens his parachute.