91影视

Work is the force times the displacement of the item and is the quantity of energy transferred between a source of applied force and the object that this force affects.

The work done as a result of the force is given by:

$W=\stackrel{鈬赌}{F}鈭�\stackrel{鈬赌}{r}cos胃$

Here, F is the force, and$鈭�r$is the displacement, and$胃$is the angle.

The applied force and displacement have the same angle$0掳$, indicating that both elements move in the same direction.

Substitute$胃=0掳$ into the formula of work done.

$$\begin{gathered} W=F鈭�r\cos 0掳 \\ =F鈭�r \end{gathered}$$

The paper shifts its position. So, the displacement is given by:

$鈭�r=r_1=r_i$

Substitute the initial and the final position vector into the above formula to find the displacement.

Substitute and into$W=F鈭�r$ to find work done.

Hence, the total work done on the paper airplane by the Earth and the air is$1.4Nm.$