Question

Considere a figura abaixo e a força F = 50N, com um deslocamento (d) na horizontal e para a direita, d = 10m. Calcule o trabalho em cada item.

Answer 1

$\tau=Fdcos\theta\\\\\tau_ a=50 \cdot 10 \cdot cos60 \degree\\\tau_ a=500 \cdot 0,5\\\boxed{\tau_ a=250J}\\\\\tau_b=50 \cdot 10 \cdot cos0 \degree\\\tau_b=500 \cdot 1\\\boxed{\tau_b=500J}\\\\\tau_c=50 \cdot 10 \cdot cos180 \degree\\\tau_c=500 \cdot (-1)\\\boxed{\tau_c=-500J}\\\\\tau_d=50 \cdot 10 \cdot cos90 \degree\\\tau_d=500 \cdot 0\\\boxed{\tau_d=0}$