The threads of a screw are an inclined plane wrapped around a post. How does a screw make the work of fastening two objects together easier?

A.The screw changes the direction of a force - it converts rotational force into linear force. It also reduces the force required - the closer the threads, the smaller the input force required to get the same output force.
B. The screw changes the direction of a force - it converts rotational force into linear force. It also reduces the force required - the closer the threads, the larger the input force required to get the same output force.
C. The screw changes the direction of a force - it converts linear force into rotational force. It also reduces the force required - the closer the threads, the smaller the input force required to get the same output force.
D. The screw changes the direction of a force - it converts linear force into rotational force. It also reduces the force required - the closer the threads, the larger the input force required to get the same output force.

Question

The threads of a screw are an inclined plane wrapped around a post. How does a screw make the work of fastening two objects together easier?

A.The screw changes the direction of a force - it converts rotational force into linear force. It also reduces the force required - the closer the threads, the smaller the input force required to get the same output force.
B. The screw changes the direction of a force - it converts rotational force into linear force. It also reduces the force required - the closer the threads, the larger the input force required to get the same output force.
C. The screw changes the direction of a force - it converts linear force into rotational force. It also reduces the force required - the closer the threads, the smaller the input force required to get the same output force.
D. The screw changes the direction of a force - it converts linear force into rotational force. It also reduces the force required - the closer the threads, the larger the input force required to get the same output force.

anonymous · Answer

@IrishBoy123 Think you can help?

anonymous · Answer

I believe step one would be to determine whether the screw's change in direction converts from rotational force to linear force or vice versa....

irishboy123 · Answer

a screw is one of the classic simple machines

preume it is obvious that rotational force into linear force??

can you sort out the second bit?

anonymous · Answer

I am not sure, but I would guess A. To be honest, I have no idea what the answer might be.

anonymous · Answer

@IrishBoy123 ^

irishboy123 · Answer

well a full turn of a screw in theory takes the screw further into the post or whatever by the distance between the threads. 

yes?

anonymous · Answer

Now I am confused... Is it A. or not?

anonymous · Answer

@IrishBoy123 ^

irishboy123 · Answer

it is A -- but i sense that you have taken absolutely nothing from this!!


an bhfuil aon phointe a ghabhann leis an??

anonymous · Answer

I am sorry, it is just that I am confused and I don't understand this question and its answers very well.

P.S. I know what you said in Irish. -_-

anonymous · Answer

Thank you for your help anyways.

irishboy123 · Answer

@BlossomCake 
we all get confused.  don't let it get to ya!  good luck.

anonymous · Answer

Thanks! ^_^