Question

A stone was dropped from the edge of a roof. Find the speed of the stone at 2 seconds after the stone was dropped

Answer 1

this is your answer.

Answer 2

Aɴsᴡᴇʀ:

• The speed of the stone after 2 second = 20m/s

Gɪᴠᴇɴ:

• Initial Velocity is 0m/s.
• Acceleration due to gravity = 10m/s².
• Time given is 2 seconds.

Nᴇᴇᴅ ᴛᴏ ғɪɴᴅ:

• The speed of the stone after 2 second = ?

Solution:

Bʏ ᴜsɪɴɢ ᴛʜᴇ ғɪʀsᴛ ᴇǫᴜᴀᴛɪᴏɴ ᴏғ ᴍᴏᴛɪᴏɴ:

• v = u + at

Pᴜᴛᴛɪɴɢ ᴛʜᴇ ᴠᴀʟᴜᴇs:

➥ Velocity = 0 + 10 × 2

➥ Velocity = 0 + 20

➥ Velocity = 20

Tʜᴇʀᴇғᴏʀᴇ:

• The speed of the stone after 2 second = 20m/s

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