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प्रश्न
A camera is accidentally knocked off an edge of a cliff 400 ft high. The camera falls a distance of s = 16t2 in t seconds. What is the instantaneous velocity of the camera when it hits the ground?
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उत्तर
f(t) = 16t2
f'(t) = 32t
f'(t) at t = 5 = 32(5)
= 160 ft/sec
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