Final answer:
The work done on the cart is calculated by multiplying the force of 20.8 N by the displacement of 8 meters, resulting in 166.4 joules of work.
Step-by-step explanation:
To determine the work done upon the cart, use the work formula:
Work (W) = Force (F) × Distance (d) × cos(θ)
Since the force is applied in the direction of the motion, the angle (θ) between the force and the direction of motion is 0°. The cosine of 0° is 1, which simplifies our calculation:
W = 20.8 N × 8 m × cos(0°)
W = 20.8 N × 8 m
W = 166.4 joules
Therefore, the work done on the 3.00-kg cart when pulled 8 meters by a 20.8 N force is 166.4 joules.