Question

determine the work required to roll a 330-pound barrel up a fifteen-foot ramp to a four-foot high platform. 4950 in-lb 82.5 ft-lb 1320 ft-lb

Explanation:

Step1: Recall Work Formula

Work \( W \) against gravity is \( W = F \cdot d \), where \( F \) is the force (weight) and \( d \) is the vertical distance.

Step2: Find Vertical Distance

The ramp is 15 ft long, platform is 4 ft high. This forms a right triangle, but work depends on vertical height \( h = 4 \) ft (since force is vertical, work is \( F \times \) vertical displacement).

Step3: Calculate Work

Force \( F = 330 \) lb, vertical distance \( d = 4 \) ft. So \( W = 330 \times 4 = 1320 \) ft-lb.

Answer:

1320 ft-lb (corresponding to the option "1320 ft-lb")