Question

a stone is dropped from the edge of roof find the speed of the stone at 2 s after the stone was dropped.

Answer 1

ᴀɴᴜꜱᴋᴀ ɴɪᴄᴇ ɴᴀᴍᴇ

ɪ ᴛʜɪɴᴋ yᴏᴜʀ qᴜᴇꜱᴛɪᴏɴ ɪꜱ ɪɴᴄᴏᴍᴩʟᴇᴛᴇ
ᴏʀ
ᴀɴꜱᴡᴇʀ ᴡᴏᴜʟᴅ ʙᴇ .....

Answer 2

V=U+AT

V= final velocity

U= initial velocity

T= time

A=acceleration

Here, We have to calculate the final velocity that is V

Now V=U+AT

U=0 ( In the initial the body is at rest)

A=9.8 m/s^2 ( earth's acceleration due to gravity)

T = 2 seconds (given)

By the condition,

V=0 + 9.8 × 2= 19.6 m/s

So, The speed of the body is 19.6 m/s