What task requires the most work, lifting a 12-kg sack 2 meters or lifting a 25-kg sack 1 meter? a.) the 12-kg sack
b.) the 25-kg sack
c.) Both require the same amount of work.
d.) Impossible to determine without knowing the contents of the sack

Please answer ASAP

Multiply the masses by the respective distances:

(12 kg) (2 m) = 24 J

(25 kg) (1 m) = 25 J

so the heavier bag takes more work to lift, and (b) is the answer.

(d) is technically correct if the sacks are carrying different contents whose masses are not equal, but since we don't know what's inside each sack, assume 12 kg and 25 kg are the masses of each sack *and* their contents.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.