Question

A block is resting on a horizontal plane and the coefficient of friction is given by ?​

Answer 1

$αɳรωεɾ$

ᴀꜱ ᴛʜᴇ ᴘʟᴀᴛᴇ ʙᴇɢɪɴꜱ ᴛᴏ ᴍᴏᴠᴇ ꜰʀɪᴄᴛɪᴏɴᴀʟ ꜰᴏʀᴄᴇ ᴀᴄᴛꜱ ᴏɴ ᴛʜᴇ ʙʟᴏᴄᴋ ᴀʟᴏɴɢ ᴛʜᴇ ᴅɪʀᴇᴄᴛɪᴏɴ ᴏꜰ ᴠɪʟᴏᴄɪᴛʏ ᴛᴏ ᴘʀᴇᴠᴇɴᴛ ʀᴇʟᴀᴛɪᴠᴇ ᴍᴏᴛɪᴏɴ.

ᴡʜᴇɴ ᴛʜᴇ ꜰᴏʀᴄᴇ ᴇxᴄᴇᴇᴅ ᴛʜᴇ ᴍᴀxɪᴍᴜᴍ ꜱᴛᴀᴛɪᴄ ꜰʀɪᴄᴛɪᴏɴ ᴛʜᴇ ʙʟᴏᴄᴋ ᴡɪʟʟ ᴍᴏᴠᴇ.

=/=2 ᴀɴᴅ ᴛʜᴇ ꜰᴏʀᴄᴇ ʙʏ ᴘʟᴀᴛᴇ ᴏɴ ʙʟᴏᴄᴋ=(ᴡʜᴇʀᴇ ᴍ ɪꜱ ᴛʜᴇ ᴍᴀꜱꜱ ᴏꜰ ʙʟᴏᴄᴋ)

ꜱᴏ,ᴡʜᴇɴ ᴇxᴄᴇᴇᴅꜱ µ ᴛʜᴇɴ ᴛʜᴇ ʙʟᴏᴄᴋ ʙᴇɢɪɴꜱ ᴛᴏ ꜱʟɪᴅᴇ.

ꜱᴏ >=µ ꜱᴏ ᴛ>=µ/2

ꜱᴏ =µ/2 ᴛʜᴇ ʙʟᴏᴄᴋ ꜱɪᴅᴇꜱ.

Answer 2

Answer:

hey mate , here is ur answer

as the plate begins to move frictional force acts on the block along the direction of velocity to prevent relative motion.

when the force exceed the maximum static friction the block will move.

a=dv/dt=2bt and the force by plate on block=ma(where m is the mass of block)

so when ma exceeds μmg then the block begins to slide

so ma>=μmg so t>=μg/2b

so at t=μg/2b the block slides

Explanation:

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