Challenge !!
A block of mass 2.0 kg is moving on a frictionless horizontal surface with a velocity of 1.0 m/s (figure 9-E12) towards another block of equal mass kept at rest. The spring constant of the spring fixed 100 N/ m find the maximum compression of the spring.
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ᴍᴀss ᴏғ ᴇᴀᴄʜ ʙʟᴏᴄᴋ ᴍᴀ ᴀɴᴅ ᴍʙ = 2kg.
ɪɴɪᴛɪᴀʟ ᴠᴇʟᴏᴄɪᴛʏ ᴏғ ᴛʜᴇ sᴛ ʙʟᴏᴄᴋ, (ᴠ) = 1m/s
- VA = 1 m/s,
- VB = 0 m/s
sᴘʀɪɴɢ ᴄᴏɴsᴛᴀɴᴛ ᴏғ ᴛʜᴇ sᴘʀɪɴɢ = 100 N/m.
ᴛʜᴇ ʙʟᴏᴄᴋ ᴀ sᴛʀɪᴋᴇs ᴛʜᴇ sᴘʀɪɴɢ ᴡɪᴛʜ ᴀ ᴠᴇʟᴏᴄɪᴛʏ 1m/s
- ᴀғᴛᴇʀ ᴛʜᴇ ᴄᴏʟʟɪsɪᴏɴ, ɪᴛ’s ᴠᴇʟᴏᴄɪᴛʏ ᴅᴇᴄʀᴇᴀsᴇs ᴄᴏɴᴛɪɴᴜᴏᴜsʟʏ ᴀɴᴅ ᴀᴛ ᴀ ɪɴsᴛᴀɴᴛ ᴛʜᴇ ᴡʜᴏʟᴇ sʏsᴛᴇᴍ (ʙʟᴏᴄᴋ ᴀ + ᴛʜᴇ ᴄᴏᴍᴘᴏᴜɴᴅ sᴘʀɪɴɢ + ʙʟᴏᴄᴋ ʙ) ᴍᴏᴠᴇ ᴛᴏɢᴇᴛʜᴇʀ ᴡɪᴛʜ ᴀ ᴄᴏᴍᴍᴏɴ ᴠᴇʟᴏᴄɪᴛʏ.
Let that velocity be V.
- Using conservation of energy,
(ᴡʜᴇʀᴇ x = ᴍᴀx. ᴄᴏᴍᴘʀᴇssɪᴏɴ ᴏғ sᴘʀɪɴɢ)
ᴀs ᴛʜᴇʀᴇ ɪs ɴᴏ ᴇxᴛᴇʀɴᴀʟ ғᴏʀᴄᴇ ɪɴ ᴛʜᴇ ʜᴏʀɪᴢᴏɴᴛᴀʟ ᴅɪʀᴇᴄᴛɪᴏɴ, ᴛʜᴇ ᴍᴏᴍᴇɴᴛᴜᴍ sʜᴏᴜʟᴅ ʙᴇ ᴄᴏɴsᴇʀᴠᴇᴅ.
- Putting in equation (1)
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