Question

a ball is thrown vertically upward with a velocity of 29.4 m/s. what is its displacement after 4 seconds?

Answer 1

Dear student,


$$\begin{gathered} y=ut-\frac{1}{2}g{t}^2 \\ =29.4\times 4-\frac{1}{2}\times 9.8\times 4^2 \\ =117.6-78.4 \\ =39.2m \end{gathered}$$
this the displacement after 4 sec.

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