The 0.1-1b projectile A is subjected to a drag force of magnitude kv², where the constant k = 0.002 lb-sec²/ft². This drag force always opposes the velocity v. At the instant depicted, v = 100 ft/sec, 0 = 45°, and r = 400 ft. Determine the corresponding values of r and e. | kv2. A 15⁰

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