Question

What is block and tackle pulley ? How does it make our work easier ?​

Answer 1

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ᴀ ʙʟᴏᴄᴋ ᴀɴᴅ ᴛᴀᴄᴋʟᴇ ᴏʀ ᴏɴʟʏ ᴛᴀᴄᴋʟᴇ ɪs ᴀ sʏsᴛᴇᴍ ᴏғ ᴛᴡᴏ ᴏʀ ᴍᴏʀᴇ ᴘᴜʟʟᴇʏs ᴡɪᴛʜ ᴀ ʀᴏᴘᴇ ᴏʀ ᴄᴀʙʟᴇ ᴛʜʀᴇᴀᴅᴇᴅ ʙᴇᴛᴡᴇᴇɴ ᴛʜᴇᴍ, ᴜsᴜᴀʟʟʏ ᴜsᴇᴅ ᴛᴏ ʟɪғᴛ ʜᴇᴀᴠʏ ʟᴏᴀᴅs. ᴛʜᴇ ᴘᴜʟʟᴇʏs ᴀʀᴇ ᴀssᴇᴍʙʟᴇᴅ ᴛᴏ ғᴏʀᴍ ʙʟᴏᴄᴋs ᴀɴᴅ ᴛʜᴇɴ ʙʟᴏᴄᴋs ᴀʀᴇ ᴘᴀɪʀᴇᴅ sᴏ ᴛʜᴀᴛ ᴏɴᴇ ɪs ғɪxᴇᴅ ᴀɴᴅ ᴏɴᴇ ᴍᴏᴠᴇs ᴡɪᴛʜ ᴛʜᴇ ʟᴏᴀᴅ.