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byerskm2
 3 years ago
An object is dropped from a tower of height 224 feet, subject to only the constant acceleration of −32 ft/sec2 due to gravity.
(d) What should its initial velocity be in order to strike the ground after 1 second?
byerskm2
 3 years ago
An object is dropped from a tower of height 224 feet, subject to only the constant acceleration of −32 ft/sec2 due to gravity. (d) What should its initial velocity be in order to strike the ground after 1 second?

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satellite73
 3 years ago
Best ResponseYou've already chosen the best response.1clearly the word "dropped" here is inappropriate, since they are asking what hthe initial velocity should be if it is dropped, the initial velocity is 0!!

byerskm2
 3 years ago
Best ResponseYou've already chosen the best response.0In order to reach the ground in 1 second the Vi would have to have a negative velocity of some value otherwise it would not be fast enough

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.1oh you put in the word "dropped" tsk tsk

byerskm2
 3 years ago
Best ResponseYou've already chosen the best response.0I just can't find the corriect value

byerskm2
 3 years ago
Best ResponseYou've already chosen the best response.0sorry that's what the question said

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.1lets try this \[a(t)=32, v(t)=32t^2+v_0, p(t)=16t^2+v_0t+224\]

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.1or more commonly written \[h(t)=16t^2+v_0t+224\]

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.1set equal to zero, then put \(t=1\) to solve for \(v_0\)

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.1\[t^2\frac{v_0}{16}14=0\]

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.1oh no your answer will have a \(v_0\) in it

byerskm2
 3 years ago
Best ResponseYou've already chosen the best response.0I plugged in 1 for t and got the 208

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.1oh wait, you are right put \(t=1\) set equal to 0 solve for \(v_0\)

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.1\[0=16+v_0+224\] \[v_0=208\]

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.1i see the problem it is negative and you put 208 i bet

byerskm2
 3 years ago
Best ResponseYou've already chosen the best response.0Oh! Darn. I even said it have to be negative in the beginning didn't I? X(

byerskm2
 3 years ago
Best ResponseYou've already chosen the best response.0I plugged it in :) it's right :P thanks! I knew I had to be right but I'm always missing some stupid detail!

satellite73
 3 years ago
Best ResponseYou've already chosen the best response.1yw always good to have another pair of eyes
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