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The distance h a body will move in a free fall is expressed by the formula h = 1/2 gt 2. If g = 980 cm per sec per sec and t = 20 sec, the distance h is

2 Answers

2 votes
h = 19,600

Step-by-step explanation:
h is unknown. we know what g and t equal, g= 980 and t = 20. Since we know these values, we first need to visit the equation to replace the variables with their values. So, the equation will now read, h = 1/2 • 980 • 20 • 2. If your teacher would like for you to show all steps, then sadly, I also dislike when this happens, you may not just skip multiplying it by two and then a half, even though, say if you multiply 4 by two, you get 8, and if you multiply it by a half again, you're back at four, so this action is pointless. but, in reality, thats just how some people work. Your teacher most likely wants you to first, multiply 980 • 20 to get 19,600, then by two again, to get 39,200. The final step would be to divide 39,200 in half, where you would land at 19,600 as you final value for h. So, after this narly paragraph, if youre just looking for an answer on your homework, h= 19,600. really hope this helped! if you need more help, feel free to ask me!

User Shawntia
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5.8k points
1 vote

Answer: 196000 cm

Step-by-step explanation:

Here, the given formula,


h = (1)/(2) gt^2

Where, g is the gravitational acceleration,

t is the time in second,

Here, g = 980 cm per sec and t = 20 seconds,

Therefore,
h = (1)/(2) * 980(20)^2=490* 400=196000

Thus, the required height = 196000 cm

User Lurks
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6.2k points