Question

what is pulley define the most important thing​

Answer 1

A wheel, with a grooved rim for carrying a line, that turns in a frame or block and serves to change the direction of or to transmit force, as when one end of the line is pulled to raise a weight at the other end: one of the simple machines.

Answer 2

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$\huge\color{navy}{\textbf{\textsf{QUESTION :-}}}$

What is pulley ? Define the most important thing.

$\huge\color{navy}{\textbf{\textsf{ANSWER :-}}}$

Pulley is a simple machine that changes the direction of a force & used to lift a load. It usually consists of grooved wheel in which a pulled rope or chain runs. Pulleys are used to reduce time & energy.

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