Question

can an internal force change the velocity of a body mass
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Answer 1

Answer:

Answer:The internal forces cannot change the total momentum but they can change the KE of the system (not just of its components). So there is no contradiction if the velocities of the components change. If the internal forces are conservatives, then the total mechanical energy (kinetic + potential) is conserved

Answer 2

Answer:

ʜᴇʀᴇ ɪs ʏᴏᴜʀ ᴀɴsᴡᴇʀ ⬇️

Explanation:

ᴛʜᴇ ɪɴᴛᴇʀɴᴀʟ ғᴏʀᴄᴇs ᴄᴀɴɴᴏᴛ ᴄʜᴀɴɢᴇ ᴛʜᴇ ᴛᴏᴛᴀʟ ᴍᴏᴍᴇɴᴛᴜᴍ ʙᴜᴛ ᴛʜᴇʏ ᴄᴀɴ ᴄʜᴀɴɢᴇ ᴛʜᴇ ᴋᴇ ᴏғ ᴛʜᴇ sʏsᴛᴇᴍ (ɴᴏᴛ ᴊᴜsᴛ ᴏғ ɪᴛs ᴄᴏᴍᴘᴏɴᴇɴᴛs). sᴏ ᴛʜᴇʀᴇ ɪs ɴᴏ ᴄᴏɴᴛʀᴀᴅɪᴄᴛɪᴏɴ ɪғ ᴛʜᴇ ᴠᴇʟᴏᴄɪᴛɪᴇs ᴏғ ᴛʜᴇ ᴄᴏᴍᴘᴏɴᴇɴᴛs ᴄʜᴀɴɢᴇ. ɪғ ᴛʜᴇ ɪɴᴛᴇʀɴᴀʟ ғᴏʀᴄᴇs ᴀʀᴇ ᴄᴏɴsᴇʀᴠᴀᴛɪᴠᴇs, ᴛʜᴇɴ ᴛʜᴇ ᴛᴏᴛᴀʟ ᴍᴇᴄʜᴀɴɪᴄᴀʟ ᴇɴᴇʀɢʏ (ᴋɪɴᴇᴛɪᴄ + ᴘᴏᴛᴇɴᴛɪᴀʟ) ɪs ᴄᴏɴsᴇʀᴠᴇᴅ.