Question

que trabalho e realizado quando 1200 kg de papel sao elevados do solo a um caminhao de 2,5 m de altura

Answer 1

$\texttt{Trabalho\hspace{3}\'e\hspace{3}a\hspace{3}energia\hspace{3}utilizada\hspace{3}para\hspace{3}mover\hspace{3}um\hspace{3}objeto\hspace{3}contra\hspace{3}a\hspace{3}}\\ \texttt{a\c{c}\~ao\hspace{3}de\hspace{3}uma\hspace{3}for\c{c}a.\hspace{3}Nesse\hspace{3}caso,\hspace{3}for\c{c}a\hspace{3}da\hspace{3}gravidade.}\\ \texttt{Com\hspace{3}base\hspace{3}nessa\hspace{3}afirma{c}\~ao,\hspace{3}e\hspace{3}sabendo}$$\texttt{que\hspace{3}a\hspace{3}gravidade\hspace{3}vai\hspace{3}gerar\hspace{3}a\hspace{3}for\c{c}a\hspace{3}peso\hspace{3}nos\hspace{3}papeis:}$

$W=\vec F\cdot d \\ W = m\cdot g\cdot H$

$\texttt{W\hspace{3}=\hspace{3}Trabalho\hspace{3}(?)}\\ \texttt{d\hspace{3}=\hspace{3}deslocamento\hspace{3}=\hspace{3}altura\hspace{3}(H)\hspace{3}=\hspace{3}2,5}\\ \texttt{F\hspace{3}=\hspace{3}for\c{c}a\hspace{3}=\hspace{3}mg}\\ \texttt{m\hspace{3}=\hspace{3}massa\hspace{3}(1200)}\\ \texttt{g\hspace{3}=\hspace{3}acelera\c{c}\~ao\hspace{3}da\hspace{3}gravidade\hspace{3}(9,8)}$

$\texttt{Resolvendo:}$

$W=m\cdot g\cdot H\\W=1200\cdot 9,8\cdot 2,5\\W=29.400\hspace{3}Joules$

$\texttt{Portanto\hspace{3}o\hspace{3}trabalho\hspace{3}(w)\hspace{3}realizado\hspace{3}\'e\hspace{3}de\hspace{3}29.400\hspace{3}Joules.}$