Final answer:
The correct option is (A) 750 J.
The work done by gravity on the bag can be calculated using the equation: Work = Force × Distance × cos(theta). In this case, the mass of the bag is 3 kg and the vertical distance is 50 m.
Step-by-step explanation:
The work done by gravity can be calculated using the equation:
Work = Force × Distance × cos(theta)
Where force is the weight of the object and distance is the vertical distance.
In this case, the mass of the bag is 3 kg and the vertical distance is 50 m.
The weight of the bag can be calculated using the formula:
Weight = mass × gravity
Where the gravity is the acceleration due to gravity which is approximately 9.8 m/s^2.
Therefore, the work done by gravity on the bag is:
Work = Weight × Distance × cos(theta)
Work = (3 kg × 9.8 m/s^2) × 50 m × cos(90°)
Work = 1470 J
Therefore, the correct option is (A) 750 J.