A worker drops a wrench from the top of a tower 57.0 m tall. With what velocity does it strike the ground?

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A worker drops a wrench from the top of a tower 57.0 m tall. With what velocity does it strike the ground?

A worker drops a wrench from the top of a tower 57.0 m tall. With what velocity does the wrench strike the ground?

2007-09-17 10:02:50 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics

3 answers

With no air resistance
57=.5*g*t^2
solve for t and plug into
v=g*t

j

2007-09-17 10:08:06 · answer #1 · answered by odu83 7 · 0⤊ 0⤋

Assuming air resistance is 0, and that g is 9.81ms^-2

v^2 = u^2 + 2ax

u = 0
a = 9.81
x = 57

so:

v^2 = 2(9.81)(57)
v^2 = 1118.34
v = 33.44159...

So the terminal velocity is 33.4 ms^-1 to 3 significant figures.

2007-09-17 10:30:00 · answer #2 · answered by tinned_tuna 3 · 0⤊ 0⤋

33.42 m/s

Doug

2007-09-17 10:21:56 · answer #3 · answered by doug_donaghue 7 · 0⤊ 0⤋