Question

Which requires more work: lifting a 70-kg sack vertically 2 meters or lifting a 35-kg sack vertically 2 meters?

• A. Lifting 70 kg sack
• B. Lifting 35 kg sack
• C. Both require the same amount of work
• D. In both cases work done is zero

Answer 1

The correct option is A

Lifting 70 kg sack

The energy consumption will be more in the lifting of 70 kg as compared to the lifting of 35 kg. Hence, work done on a heavier object for the same distance will be more as compared to the lighter one.