what r machines,what r simple machines,how r both used for what n why,who invented it
Kindly post your questions in different threads to get all the answers.
Refer to the link given below to get the answer of the Ist question :
https://www.meritnation.com/ask-answer/question/what-are-machines/physics/471282
Refer to the link given below to get the answer of the Ist question :
https://www.meritnation.com/ask-answer/question/what-are-machines/physics/471282