Question

what is contact force ???​

Answer 1

$\mathfrak{\large{\underline{\underline{Contact\: Force}}}}$

• Force that act only when there is physical contact between two interacting objects are known as contact force.
• The force of friction always acts on all the moving objects and it's direction is always opposite to the direction of motion.
• Example :- Muscular Force and frictional Force.

Answer 2

$\huge{\fbox{\fbox{\bigstar{\mathfrak{\red{Contact\: Force}}}}}}$

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ғᴏʀᴄᴇs ᴛʜᴀᴛ ᴀᴄᴛ ᴏɴʟʏ ᴡʜᴇɴ ᴛʜᴇʀᴇ ɪs ᴘʜʏsɪᴄᴀʟ ᴄᴏɴᴛᴀᴄᴛ ʙᴇᴛᴡᴇᴇɴ ᴛᴡᴏ ɪɴᴛᴇʀᴀᴄᴛɪɴɢ ᴏʙᴊᴇᴄᴛs ᴀʀᴇ ᴋɴᴏᴡɴ ᴀs ᴄᴏɴᴛᴀᴄᴛ ғᴏʀᴄᴇ.

ᴄᴏɴᴛᴀᴄᴛ ғᴏʀᴄᴇ ᴡʜɪᴄʜ ᴀᴄᴛs ᴏɴʟʏ ᴡʜᴇɴ ᴏʙᴊᴇᴄᴛs ᴀʀᴇ ɪɴ ᴘʜʏsɪᴄᴀʟ ᴄᴏɴᴛᴀᴄᴛ ᴡɪᴛʜ ᴇᴀᴄʜ ᴏᴛʜᴇʀ.

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$<marquee>$

$\fbox{\bold{\large{For\: Example:-}}}$

$\bf{\green{Muscular\: Force}}$

$\bf{\green{Gravitational\: Force}}$