Stage 1 - Parachutist jumps into air. Forces not equal. Weight greater than air resistance. Accelerating. Small surface area., Stage 2 - Terminal velocity, 120mph. Forces equal. Weight = air resistance. Constant speed., Stage 3 - Parachute opened. Forces not equal. Air resistance greater than weight. Decelerating. Large surface area., Stage 4 - Second terminal velocity. 15mph. Forces equal. Weight = air resistance. Lands at a safe speed.,

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