Question

A body initially at rest is moving with uniform acceleration “a”. It’s velocity after n seconds is v. The displacement of the body in last 2 seconds is ......⁶​

Answer 1

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⚛sɪɴᴄᴇ ᴘᴀʀᴛɪᴄʟᴇ sᴛᴀʀᴛs ғʀᴏᴍ ʀᴇsᴛ

❃ɪɴɪᴛɪᴀʟ ᴠᴇʟᴏᴄɪᴛʏ (ᴜ)=0ᴍ/s

ᴛʜᴇ ᴅɪsᴛᴀɴᴄᴇ ɪɴ ɴ sᴇᴄ

s (ɴ) = ᴜɴ + 0.5 ᴀɴ^2

s(ɴ) = (ᴀɴ^2) / (2)

❃ᴛʜᴇ ᴅɪsᴛᴀɴᴄᴇ ɪɴ( ɴ-2) sᴇᴄ

s (ɴ-2) = { ᴀ (ɴ-2)^2 } / {2}

s(ɴ) - s (ɴ-2) = 2ᴀ (ɴ-1)…………..(ɪ)

⚛ᴇǫᴜᴀᴛɪᴏɴ (ɪ) ɪs ᴛʜᴇ ᴅɪsᴘʟᴀᴄᴇᴍᴇɴᴛ ᴏғ ʙᴏᴅʏ ɪɴ ʟᴀsᴛ 2 sᴇᴄᴏɴᴅ

❃ғʀᴏᴍ ǫᴜᴇsᴛɪᴏɴ

ᴠᴇʟᴏᴄɪᴛʏ (ᴠ) = ᴜ + ᴀɴ

ᴠ = ᴀɴ

ᴀ= ᴠ/ɴ…….(ɪɪ)

ғʀᴏᴍ ᴇǫᴜᴀᴛɪᴏɴs (ɪ) ᴀɴᴅ (ɪɪ)

⚜{ 2 ᴠ (ɴ-1) } / ɴ

Answer 2

Answer:

⋆

Answer

⋆

⚛sɪɴᴄᴇ ᴘᴀʀᴛɪᴄʟᴇ sᴛᴀʀᴛs ғʀᴏᴍ ʀᴇsᴛ

❃ɪɴɪᴛɪᴀʟ ᴠᴇʟᴏᴄɪᴛʏ (ᴜ)=0ᴍ/s

ᴛʜᴇ ᴅɪsᴛᴀɴᴄᴇ ɪɴ ɴ sᴇᴄ

s (ɴ) = ᴜɴ + 0.5 ᴀɴ^2

s(ɴ) = (ᴀɴ^2) / (2)

❃ᴛʜᴇ ᴅɪsᴛᴀɴᴄᴇ ɪɴ( ɴ-2) sᴇᴄ

s (ɴ-2) = { ᴀ (ɴ-2)^2 } / {2}

s(ɴ) - s (ɴ-2) = 2ᴀ (ɴ-1)…………..(ɪ)

⚛ᴇǫᴜᴀᴛɪᴏɴ (ɪ) ɪs ᴛʜᴇ ᴅɪsᴘʟᴀᴄᴇᴍᴇɴᴛ ᴏғ ʙᴏᴅʏ ɪɴ ʟᴀsᴛ 2 sᴇᴄᴏɴᴅ

❃ғʀᴏᴍ ǫᴜᴇsᴛɪᴏɴ

ᴠᴇʟᴏᴄɪᴛʏ (ᴠ) = ᴜ + ᴀɴ

ᴠ = ᴀɴ

ᴀ= ᴠ/ɴ…….(ɪɪ)

ғʀᴏᴍ ᴇǫᴜᴀᴛɪᴏɴs (ɪ) ᴀɴᴅ (ɪɪ)

⚜{ 2 ᴠ (ɴ-1) } / ɴ