A balloonist happens to drop his metal ballpoint pen from his balloon as he is taking notes on his flight. Because his pen has a streamlined shape, air resistance has little effect on its fall. The pen strikes the ground at 22 m/s. How high was the balloon?
(Points : 6)
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\(\vec v_f^2=\vec v_i^2+2\vec a \cdot \vec S\)
since \(\vec v_i=0\hat j\),\(\vec v_f=-22\hat j\),\(\vec a=-10\hat j \),
plug it in to get,
\((-22\hat j)^2=2(-10\hat j) \cdot \vec S\)
\(\vec S=-24.2\hat j\)
do you need further help?
@Shadowys u could've aloud @megen505 to solve this q' her own and understand. at least a chance