Final answer:
The work done in lifting 30 kg of bricks to a height of 20 m is calculated using the formula W = mgh, which gives 5880 J. Therefore, the correct answer is 5880 J.
Step-by-step explanation:
The work done in lifting 30 kg of bricks to a height of 20 m can be calculated using the formula for gravitational potential energy, which is work done against gravity. The formula is W = mgh, where W is the work done in joules (J), m is the mass in kilograms (kg), g is the acceleration due to gravity (9.8 m/s2), and h is the height in meters (m).
To find the work done, we substitute the given values into the formula: W = 30 kg × 9.8 m/s2 × 20 m. Calculating this gives us W = 5880 J. Therefore, the correct answer is: d) 5880 J.