Question

The work done by the tension on the block is:

• A. $40J$
• B. less than $40J$
• C. more than $40J$
• D. Data insufficient

Answer 1

The correct option is C more than $40J$

The work done by the tension in the block, that is the external force, is equal to the sum of gain in kinetic energy of the block and work done by block against the gravity.

Thus work done by tension in the block is more than $40J$.