It's like riding a 10 speed bike. On the smaller sprocket, it is easier to turn the pedals. You use the smaller sprocket for going up hill or through grass, this requires more turns but the actual work to turn the pedals goes down. Easy.
That's not how this works.... think about riding a 5 speed bike, you use the lower (SMALLER) gear to get going and for hills because it is EASIER to turn the gear. This does not ask for the greatest results, it asks for the ease of the turn.
Think of it in terms of lifting weights: does it require more effort to do 10 reps of light weight or 5 reps of heavy weight? It is easier to do 10 reps of light weight (A) than 5 reps of heavy weight (C). Hope that makes sense.
conservation of energy here folks. it takes the same amount of energy to raise the weight from the bottom to the top the difference is in how fast you do it. It takes more torque to raise it with C but in less revolutions.
Pretty sure you're wrong guy. If I pull in more rope with 1 revolution with a bigger drum, compared to less rope with 1 revolution with a smaller drum. Then it would take less work (effort) and time (efficiency) with the larger lever and larger drum. C is the answer.
Well we can agree to disagree then because to me the system that takes less time to accomplish the task of raising a load (more efficient) would require less work (less effort) given that the levers of A and C are the same length and the weight being raised is also equal, how is C not the answer? Even though the question being asked is based on less effort... If I'm raising x amount of weight for 20 sec with a smaller drum compared to x amount of weight for 10 sec with a bigger drum, then I'm expending less total energy by using the bigger drum. So C (to me) is the answer. The question says nothing about the weight of the drum or resistance. Obviously a bad question that needs more explanation because I can see arguments for both sides
Also think of it like this. Effort (work) in physics = force x distance. So since lever size and weight being pulled up are constant for both systems, the force required to pull up the weight is equal. Therefore the only variable left that relates to work is the distance (in this case number of revolutions of the wheel) and because of the larger diameter of the bigger drum, less revolutions are needed to pull up the weight.
If I remember well Effort(work) is force times displacement. Thus the the box is "displaced" by same amount in both the cases. Do correct me if am wrong to understand it.
that means that youre probably of the people that just have an eye for this type of test this is one of those, get it fast type of questions... some people get it others dont
It's like riding a 10 speed bike. On the smaller sprocket, it is easier to turn the pedals. You use the smaller sprocket for going up hill or through grass, this requires more turns but the actual work to turn the pedals goes down. Easy.
I tried explaining this in the above comment and was told I was wrong.
Wouldn't you have to exert more work on A because you have to turn it more times?? Making C the one with less effort??.... Still confused...
that was my thinking as well
That's not how this works.... think about riding a 5 speed bike, you use the lower (SMALLER) gear to get going and for hills because it is EASIER to turn the gear. This does not ask for the greatest results, it asks for the ease of the turn.
BublisC you gay
Jessica Cruz i definetly agree with you Jessica!!!!!!!!!! Lol
Think of it in terms of lifting weights: does it require more effort to do 10 reps of light weight or 5 reps of heavy weight? It is easier to do 10 reps of light weight (A) than 5 reps of heavy weight (C). Hope that makes sense.
conservation of energy here folks. it takes the same amount of energy to raise the weight from the bottom to the top the difference is in how fast you do it. It takes more torque to raise it with C but in less revolutions.
What book would you suggest I read to get more familiar?
How is the answer not C???????!!!!! If drum is bigger it will finish alot faster....wtf??
It's C...
Pretty sure you're wrong guy. If I pull in more rope with 1 revolution with a bigger drum, compared to less rope with 1 revolution with a smaller drum. Then it would take less work (effort) and time (efficiency) with the larger lever and larger drum. C is the answer.
Wrong. He is asking which is easier, not which one produces a greater result. Big difference.
Well we can agree to disagree then because to me the system that takes less time to accomplish the task of raising a load (more efficient) would require less work (less effort) given that the levers of A and C are the same length and the weight being raised is also equal, how is C not the answer? Even though the question being asked is based on less effort... If I'm raising x amount of weight for 20 sec with a smaller drum compared to x amount of weight for 10 sec with a bigger drum, then I'm expending less total energy by using the bigger drum. So C (to me) is the answer. The question says nothing about the weight of the drum or resistance. Obviously a bad question that needs more explanation because I can see arguments for both sides
You're last sentence completes your point. Not enough details to explain what "less effort" equates to.
Also think of it like this. Effort (work) in physics = force x distance. So since lever size and weight being pulled up are constant for both systems, the force required to pull up the weight is equal. Therefore the only variable left that relates to work is the distance (in this case number of revolutions of the wheel) and because of the larger diameter of the bigger drum, less revolutions are needed to pull up the weight.
If I remember well Effort(work) is force times displacement. Thus the the box is "displaced" by same amount in both the cases. Do correct me if am wrong to understand it.
I instantly guessed a which is correct does that mean I'm a genius
same 😂
that means that youre probably of the people that just have an eye for this type of test this is one of those, get it fast type of questions... some people get it others dont
I disagree to who ever made this question.
It’s actually C bigger rod more space and less work. Dumb dumbs in this world wow 😮 lol