Question

Dan and Louis both weighed 90 lbs. Both climbed a hill which rose 60 feet. It took Dan 10 minutes and Louis 4 minutes.

How much work did Dan and Louis do?

Dan: 540 foot-pounds, Louis: 1200 foot-pounds
Dan: 5400 foot-pounds, Louis: 5400 foot-pounds
Dan: 900 foot-pounds, Louis: 360 foot-pounds

Answer 1

any ideas

Answer 2

work done =Force X displacement

Answer 3

okey i think that it is the last answer

Answer 4

or better said dot product of force and displacement

Answer 5

well I dont think we need to use the time given because time comes to account only when we talk about power .For work done what we need to look at is force acting and how much displacement acting

Answer 6

*displacement moved

Answer 7

okey

Answer 8

now weight is actually force exerted to our body due to gravity and equals mg

Answer 9

both have same weight so equal "force "acts for both Dan and Louis

Answer 10

and do the same work but one does it in less time than the other one

Answer 11

yep so I bet the work done is same for both but power or "rate of doing work " is different for both of them

Answer 12

The only option that agrees to our conclusion is B . So I think that would be the answer

Answer 13

okey but what ever his name is did it faster than the other one

Answer 14

yep less time then more power

Answer 15

yeah so the answer is still b

Answer 16

??????????????

Answer 17

yep because we are only concerned with work done not power