Question

1. a submarine rises to the ocean’s surface, moving up 30 m. the work required to do so is 80 kj. calculate the net force on the submarine. make sure to draw the vector’s force and displacement. givens: w = __ s = __ equation to use: substitute & solve: unknowns: what are you solving for?

Explanation:

Step1: List given values

$W = 80\ \text{kJ} = 80000\ \text{J}$, $s = 30\ \text{m}$

Step2: State work-force equation

$W = F \cdot s$

Step3: Rearrange for net force $F$

$F = \frac{W}{s}$

Step4: Substitute values and solve

$F = \frac{80000\ \text{J}}{30\ \text{m}} \approx 2666.67\ \text{N}$
(Note: Force and displacement vectors point upward, parallel to each other)

Answer:

The net force on the submarine is approximately $\boldsymbol{2667\ \text{N}}$ (directed upward, parallel to the displacement vector).