How do u enter j beam or car structure or whatever it called?

IDK what its called but i wanna drag my car around so how do i do it

 

by reading the wiki. its there for a reason.
(like i read the wiki) (sarcasm)

 

press ctrl then click on a blue circle with your mouse. scroll wheel increases and decreases force

couldve just told him, but yes thats true

 

I Love how both of the answers are answered by ducks haha.