Question

You and a friend (Alex) are at a a tree-top adventure park .. . . part of the course requires you to climb up a rope. You both climb the same rope in the same amount of time. However, the tension in the rope is greater when Alex climbs. Who did the most work?



Alex did - more tension means more force - more force means more work was done


You did - less tension means less force - less force means more work was done



To find the work done, the force exerted and distance moved are multiplied. A couch is moved twice before you are happy with its placement. The same force was used to move the couch both times. If more work is done the first time it is moved, what do you know about the distance it was moved?



When more work was done, the couch was moved less.


When more work was done, the couch was moved further.


When more work was done, the couch wasn't moved at all.


When more work was done, the couch was moved the same distance.

Answer 1

Alex did - more tension means more force - more force means more work

Answer 2

1.

Answer

Correct answer is

Alex did- more tension means more force-more force means more work was done.

Explanation

We know that tension in string is given as

Tension= mass$\times acceleration$

it means Tension=Force

and Work=Force$\times displacement$

So when tension is more that time force will be more and hence more work has  to be done

So Alex did the most work.

2.

Answer

Correct Answer is (When more work was done, the couch was moved further)

Explanation

We know that

Work=Force$\times displacement$

Since force is same both time

therefore work will be directly proportional to displacement

it means when more work was done, the couch was moved further.