Question

15. A bullet is fired horizontally on a vertical mud wall
after moving x distance in mud wall speed of bulle
becomes th of the initial speed. If bullet comes
to rest after travelling a further distance y, then y
is equal to
(1) *
(2) 5*
worolo​

Answer 1

Answer:

y = 9x/7

Explanation:

A bullet is fired horizontal on a vertical mud wall, after moving x distance in mud wall speed of bullet becomes 3/4th of the initial speed. if bullet comes rest after traveling a further distance y, then y is equal to

Using v² - u² = 2as

let say initial Velocity = v

after x distance it become 3v/4

=> (3v/4)² - v² = 2ax

=> 9v² - 16v² = 32ax

=> a = -7v²/32x

Further Distance y is covered before rest

=> 0² - (3v/4)²  = 2ay

=> -9v²/16 = 2(-7v²/32x) y

=> y = 9x/7