Stage 1 - Skydiver jumps into air. Forces not equal. Weight greater than air resistance. Goes faster (accelerates). Small surface area., Stage 2 - Terminal speed, 120mph. Forces equal. Weight = air resistance. Constant speed., Stage 3 - Parachute opened. Forces not equal. Air resistance greater than weight. Slows down (decelerating). Large surface area., Stage 4 - Second terminal speed. 15mph. Forces equal. Weight = air resistance. Lands at a safe speed.,

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