A motor car is running at the rate of 7m/sec can be stopped by brakes in 10 m prove that the total resistance to the motion,when the brakes are on is one fourth of the wt. Of the car
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ɪɴɪᴛɪᴀʟ sᴘᴇᴇᴅ = 7⃣ᴍ/s
ғɪɴᴀʟ ᴠᴇʟᴏᴄɪᴛʏ = 0⃣
ᴅɪsᴛᴀɴᴄᴇ = 1⃣0⃣ᴍ
ᴠ = ᴜ +2⃣ᴀs
-4⃣9⃣ = 2⃣0⃣ᴀ
ᴀ = -4⃣9⃣/2⃣0⃣
ᴡᴇɪɢʜᴛ ᴏғ ʙᴏᴅʏ = ᴍɢ
ʀᴇsɪsᴛᴀɴᴄᴇ = -ᴍᴀ
ʀᴀᴛɪᴏ = g:a
1⃣0⃣:4⃣9⃣/2⃣0⃣
2⃣0⃣0⃣:4⃣9⃣
ᴏʀ ᴀᴘᴘʀᴏx
2⃣0⃣0⃣:5⃣0⃣
4⃣:1⃣
sᴏ ʀᴇsɪsᴛɪᴠᴇ ғᴏʀᴄᴇ ɪs ᴏɴᴇ ғᴏᴜʀᴛʜ ᴏғ ᴛʜᴇ ᴡᴇɪɢʜᴛ ᴏғ ᴛʜᴇ ʙᴏᴅʏ
ғɪɴᴀʟ ᴠᴇʟᴏᴄɪᴛʏ = 0⃣
ᴅɪsᴛᴀɴᴄᴇ = 1⃣0⃣ᴍ
ᴠ = ᴜ +2⃣ᴀs
-4⃣9⃣ = 2⃣0⃣ᴀ
ᴀ = -4⃣9⃣/2⃣0⃣
ᴡᴇɪɢʜᴛ ᴏғ ʙᴏᴅʏ = ᴍɢ
ʀᴇsɪsᴛᴀɴᴄᴇ = -ᴍᴀ
ʀᴀᴛɪᴏ = g:a
1⃣0⃣:4⃣9⃣/2⃣0⃣
2⃣0⃣0⃣:4⃣9⃣
ᴏʀ ᴀᴘᴘʀᴏx
2⃣0⃣0⃣:5⃣0⃣
4⃣:1⃣
sᴏ ʀᴇsɪsᴛɪᴠᴇ ғᴏʀᴄᴇ ɪs ᴏɴᴇ ғᴏᴜʀᴛʜ ᴏғ ᴛʜᴇ ᴡᴇɪɢʜᴛ ᴏғ ᴛʜᴇ ʙᴏᴅʏ
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