4ᴀ: ʀɪᴠᴇᴛᴇᴅ ᴊᴏɪɴᴛ: ᴛᴡᴏ ᴘʟᴀᴛᴇꜱ, ꜱᴜʙᴊᴇᴄᴛᴇᴅ ᴛᴏ ᴀ ᴛᴇɴꜱɪʟᴇ ꜰᴏʀᴄᴇ ᴏꜰ 50 ᴋɴ, ᴀʀᴇ ꜰɪxᴇᴅ ᴛᴏɢᴇᴛʜᴇʀ ʙʏ ᴍᴇᴀɴꜱ ᴏꜰ ᴛʜʀᴇᴇ ʀɪᴠᴇᴛꜱ ᴀꜱ ꜱʜᴏᴡɴ ɪɴ ᴛʜᴇ ɢɪᴠᴇɴ ꜰɪɢᴜʀᴇ, ᴡʜᴏꜱᴇ ᴊᴏɪɴᴛ ᴡɪᴅᴛʜ ɪꜱ ᴡ = 200 ᴍᴍ. (ᴀ). ᴛʜᴇ ᴘʟᴀᴛᴇꜱ ᴀʀᴇ ᴍᴀᴅᴇ ᴏꜰ ᴘʟᴀɪɴ ᴄᴀʀʙᴏɴ ꜱᴛᴇᴇʟ 1020 ᴡɪᴛʜ ᴀ ᴛᴇɴꜱɪʟᴇ ʏɪᴇʟᴅ ꜱᴛʀᴇɴɢᴛʜ ᴏꜰ 250 ɴ/ᴍᴍ2. ᴛʜᴇ ʀɪᴠᴇᴛꜱ ʜᴀᴠᴇ ᴀ ʏɪᴇʟᴅ ꜱᴛʀᴇɴɢᴛʜ ɪɴ ꜱʜᴇᴀʀ ᴏꜰ 100 ᴍᴘᴀ. ᴛʜᴇ ꜰᴀᴄᴛᴏʀ ᴏꜰ ꜱᴀꜰᴇᴛʏ ɪꜱ ᴛᴏ ʙᴇ 2.5. ɴᴇɢʟᴇᴄᴛɪɴɢ ꜱᴛʀᴇꜱꜱ ᴄᴏɴᴄᴇɴᴛʀᴀᴛɪᴏɴ, ᴅᴇᴛᴇʀᴍɪɴᴇ (ᴀ) ᴛʜᴇ ᴍɪɴɪᴍᴜᴍ ᴅɪᴀᴍᴇᴛᴇʀ ᴏꜰ ᴛʜᴇ ʀɪᴠᴇᴛꜱ; ᴀɴᴅ (ʙ) ᴛʜᴇ ᴛʜɪᴄᴋɴᴇꜱꜱ ᴏꜰ ᴛʜᴇ ᴘʟᴀᴛᴇꜱ. ᴜꜱᴇ ᴘʀᴇꜰᴇʀʀᴇᴅ ꜱɪᴢᴇꜱ ɪɴ ᴍᴍ.
4ᴀ: ʀɪᴠᴇᴛᴇᴅ ᴊᴏɪɴᴛ: ᴛᴡᴏ ᴘʟᴀᴛᴇꜱ, ꜱᴜʙᴊᴇᴄᴛᴇᴅ ᴛᴏ ᴀ ᴛᴇɴꜱɪʟᴇ ꜰᴏʀᴄᴇ ᴏꜰ 50 ᴋɴ, ᴀʀᴇ ꜰɪxᴇᴅ ᴛᴏɢᴇᴛʜᴇʀ ʙʏ ᴍᴇᴀɴꜱ ᴏꜰ ᴛʜʀᴇᴇ ʀɪᴠᴇᴛꜱ ᴀꜱ ꜱʜᴏᴡɴ ɪɴ ᴛʜᴇ ɢɪᴠᴇɴ ꜰɪɢᴜʀᴇ, ᴡʜᴏꜱᴇ ᴊᴏɪɴᴛ ᴡɪᴅᴛʜ ɪꜱ ᴡ = 200 ᴍᴍ. (ᴀ). ᴛʜᴇ ᴘʟᴀᴛᴇꜱ ᴀʀᴇ ᴍᴀᴅᴇ ᴏꜰ ᴘʟᴀɪɴ ᴄᴀʀʙᴏɴ ꜱᴛᴇᴇʟ 1020 ᴡɪᴛʜ ᴀ ᴛᴇɴꜱɪʟᴇ ʏɪᴇʟᴅ ꜱᴛʀᴇɴɢᴛʜ ᴏꜰ 250 ɴ/ᴍᴍ2. ᴛʜᴇ ʀɪᴠᴇᴛꜱ ʜᴀᴠᴇ ᴀ ʏɪᴇʟᴅ ꜱᴛʀᴇɴɢᴛʜ ɪɴ ꜱʜᴇᴀʀ ᴏꜰ 100 ᴍᴘᴀ. ᴛʜᴇ ꜰᴀᴄᴛᴏʀ ᴏꜰ ꜱᴀꜰᴇᴛʏ ɪꜱ ᴛᴏ ʙᴇ 2.5. ɴᴇɢʟᴇᴄᴛɪɴɢ ꜱᴛʀᴇꜱꜱ ᴄᴏɴᴄᴇɴᴛʀᴀᴛɪᴏɴ, ᴅᴇᴛᴇʀᴍɪɴᴇ (ᴀ) ᴛʜᴇ ᴍɪɴɪᴍᴜᴍ ᴅɪᴀᴍᴇᴛᴇʀ ᴏꜰ ᴛʜᴇ ʀɪᴠᴇᴛꜱ; ᴀɴᴅ (ʙ) ᴛʜᴇ ᴛʜɪᴄᴋɴᴇꜱꜱ ᴏꜰ ᴛʜᴇ ᴘʟᴀᴛᴇꜱ. ᴜꜱᴇ ᴘʀᴇꜰᴇʀʀᴇᴅ ꜱɪᴢᴇꜱ ɪɴ ᴍᴍ.
4ʙ: ᴄᴇɴᴛʀɪꜰᴜɢᴀʟ ᴀᴄᴛɪᴏɴ: ᴀ ᴄᴇɴᴛʀɪꜰᴜɢᴇ ʜᴀꜱ ᴀ ꜱᴍᴀʟʟ ʙᴜᴄᴋᴇᴛ, ᴡᴇɪɢʜɪɴɢ 2 ʟʙ. ᴡɪᴛʜ ᴄᴏɴᴛᴇɴᴛꜱ, ꜱᴜꜱᴘᴇɴᴅᴇᴅ ᴏɴ ᴀ ᴍᴀɴɢᴀɴᴇꜱᴇ ʙʀᴏɴᴢᴇ ᴘɪɴ (ʙ138-ᴀ,ʏ2 ʜᴀʀᴅ) ᴀᴛ ᴛʜᴇ ᴇɴᴅ ᴏꜰ ᴀ ʜᴏʀɪᴢᴏɴᴛᴀʟ ᴀʀᴍ. ɪꜰ ᴛʜᴇ ᴘɪɴ ɪꜱ ɪɴ ᴅᴏᴜʙʟᴇ ꜱʜᴇᴀʀ ᴜɴᴅᴇʀ ᴛʜᴇ ᴀᴄᴛɪᴏɴ ᴏꜰ ᴛʜᴇ ᴄᴇɴᴛʀɪꜰᴜɢᴀʟ ꜰᴏʀᴄᴇ, ᴅᴇᴛᴇʀᴍɪɴᴇ ᴛʜᴇ ᴅɪᴀᴍᴇᴛᴇʀ ɴᴇᴇᴅᴇᴅ ꜰᴏʀ 10,000 ʀᴘᴍ ᴏꜰ ᴛʜᴇ ᴀɴɴ. ᴛʜᴇ ᴄᴇɴᴛᴇʀ ᴏꜰ ɢʀᴀᴠɪᴛʏ ᴏꜰ ᴛʜᴇ ʙᴜᴄᴋᴇᴛ ɪꜱ 12 ɪɴ. ꜰʀᴏᴍ ᴛʜᴇ ᴀxɪꜱ ᴏꜰ ʀᴏᴛᴀᴛɪᴏɴ.
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