A suitcase is pulled 20 feet along a flat sidewalk with a constant upward force of 80 lb at an angle of \( 23^{\circ} \) with the horizontal. Calculate the work done. The work done is \( \square \) foot-pounds. (Round to the nearest foot-pound as needed.)

To calculate the work done when pulling the suitcase, we use the formula: \[ \text{Work} = F \cdot d \cdot \cos(\theta) \] where: - \( F = 80 \) lb (the force applied) - \( d = 20 \) feet (the displacement) - \( \theta = 23^\circ \) (the angle of the force above the horizontal) First, calculate the horizontal component of the force: \[ F_{\text{horizontal}} = F \cdot \cos(\theta) = 80 \cdot \cos(23^\circ) \] Using \(\cos(23^\circ) \approx 0.9205\): \[ F_{\text{horizontal}} \approx 80 \cdot 0.9205 = 73.64 \text{ lb} \] Now, calculate the work done: \[ \text{Work} = F_{\text{horizontal}} \cdot d = 73.64 \cdot 20 = 1472.8 \text{ foot-pounds} \] Rounded to the nearest foot-pound: \[ \text{Work} \approx 1473 \text{ foot-pounds} \] **Answer:** 1473 foot-pounds