Question

ᴀɴ ᴏʙᴊᴇᴄᴛ ɪs ᴛʜʀᴏᴡɴ ᴠᴇʀᴛɪᴄᴀʟʟʏ ᴜᴘᴡᴀʀᴅs ᴀɴᴅ ʀɪsᴇs ᴛᴏ ᴀ ʜᴇɪɢʜᴛ ᴏғ 10 ᴍ . ᴄᴀʟᴄᴜʟᴀᴛᴇ ᴛʜᴇ ᴠᴇʟᴏᴄɪᴛʏ ᴡɪᴛʜ ᴡʜɪᴄʜ ᴛʜᴇ ᴏʙᴊᴇᴄᴛ ᴡᴀs ᴛʜʀᴏᴡɴ ᴜᴘᴡᴀʀᴅs ᴀɴᴅ ᴛʜᴇ ᴛɪᴍᴇ ᴛᴀᴋᴇɴ ʙʏ ᴛʜᴇ ᴏʙᴊᴇᴄᴛ ᴛᴏ ʀᴇᴀᴄʜ ᴛʜᴇ ʜɪɢʜᴇsᴛ ᴘᴏɪɴᴛ.​

Answer 1

Answer:

Distance travelled, s = 10 m

Final velocity, v = 0 m/s

g = -9.8 m/s ^2

 

1) Using,

v^2 - u^2 = 2gs

-u^2= 2 x -9.8m/s^2 x 10

u^2 = 196

u = root 196

u = 14m/s

u=14m/s, where u is the velocity with which the object is thrown upwards.

2) Using,

v=u+gt

t= v-u/g

 =1.43 sec

Explanation: