Question

What is centrifugal force ? In which direction its acts? Why it is called pseudo force?

Answer 1

the centrifugal force is an inertial force (also called a "fictitious" or "pseudo" force) directed away from the axis of rotation that appears to act on all objects when viewed in a rotating frame of reference.
Centrifugal force is called pseduo because it is imaginary force,but it becomes usefull in some cases.

The particles in this force are tangentially thrown outwards.

Answer 2

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Cᴇɴᴛʀɪғᴜɢᴀʟ Fᴏʀᴄᴇ➠ Tʜᴇ ᴛᴇɴᴅᴇɴᴄʏ ᴏғ ᴀɴ ᴏʙᴊᴇᴄᴛ ᴍᴏᴠɪɴɢ ɪɴ ᴀ ᴄɪʀᴄʟᴇ ᴛᴏ ᴛʀᴀᴠᴇʟ ᴀᴡᴀʏ ғʀᴏᴍ ᴛʜᴇ ᴄᴇɴᴛᴇʀ ᴏғ ᴛʜᴇ ᴄɪʀᴄʟᴇ.

➘ Cᴇɴᴛʀɪғᴜɢᴀʟ ғᴏʀᴄᴇ ɪꜱ ᴀʟᴡᴀʏꜱ ᴅɪʀᴇᴄᴛᴇᴅ ᴘᴇʀᴘᴇɴᴅɪᴄᴜʟᴀʀ ᴛᴏ ᴛʜᴇ ᴅɪʀᴇᴄᴛɪᴏɴ ᴛʜᴀᴛ ᴛʜᴇ ᴏʙᴊᴇᴄᴛ ɪꜱ ʙᴇɪɴɢ ᴅɪꜱᴘʟᴀᴄᴇᴅ.

➘ Cᴇɴᴛʀɪғᴜɢᴀʟ ғᴏʀᴄᴇ ɪꜱ ᴄᴀʟʟᴇᴅ ᴘꜱᴇᴅᴜᴏ ғᴏʀᴄᴇ, ʙᴇᴄᴀᴜꜱᴇ ɪᴛ ɪꜱ ɪᴍᴀɢɪɴᴀʀʏ ғᴏʀᴄᴇ.