SOLUTION: I need help solving this word problem. A weight lifting dumbbell is dropped from a height of 80 feet. How long does it take to hit the ground?
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Question 1171111: I need help solving this word problem. A weight lifting dumbbell is dropped from a height of 80 feet. How long does it take to hit the ground? Answer by ikleyn(52777) (Show Source):
Physicist knows which formula to use
80 = ,
where "g" is the free fall acceleration g = 32 ft/s^, t is the time.
From the formula, t = = = = 2.236 seconds.
The Algebra student writes practically the same equation
- + 80 = 0.
He solves it this way
= 80
= 80/16 = 5
t = = 2.236 seconds
and obtains the same ANSWER.
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