Question

ᴀ ʙᴏᴅʏ ᴛʜʀᴏᴡɴ ᴠᴇʀᴛɪᴄᴀʟʟʏ ᴜᴘᴡᴀʀᴅs ᴡɪᴛʜ ᴀ sᴘᴇᴇᴅ ᴏғ 19.6 ᴍ/s ғʀᴏᴍ ᴛʜᴇ ᴛᴏᴘ ᴏғ ᴀ ᴛᴏᴡᴇʀ ʀᴇᴛᴜʀɴs ᴛᴏ ᴛʜᴇ ᴇᴀʀᴛʜ ɪɴ 10 sᴇᴄᴏɴᴅs. ᴡʜᴀᴛ ɪs ᴛʜᴇ ʜᴇɪɢʜᴛ ᴏғ ᴛʜᴇ ᴛᴏᴡᴇʀ? (ɢ = 10ᴍs)

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Answer 1

Explanation:

u=19.6

v=0

s=ut+1/2at^2

I.e -S=196+500

=696m

Answer 2

Answer:

313.6m

Explanation:

For upward motion:

u=19.6m/s

v=0m/s

a= -9.8m/s

v=u+at

0=19.6+(-9.8)t

t=2s

This means that the ball will reach highest point after 2s.

It will come to earth after 8s from highest point.

For downward motion:

t=8s

u=0m/s

a=+9.8m/s

$s = ut + 1 \div 2at {}^{2}$

s=0+1/2(9.8)×64

s=313.6m