Question

a bullet fired into a trunk of a tree loses 1/4 of its kinetic energy in traveling a distance of 5cm.before stopping it travels a further distance of

Answer 1

While moving through the trunk work done against the friction will lose the kinetic energy

so here we can say

$W = K_f - K_i$

$-F_f* 5 cm = -\frac{1}{4}K$

now let say it covers a total distance of "d" before coming to rest

so we can write

$- F_f * d = - K[tex]</p><p>now divide above two equations</p><p>[tex]\frac{ - F_f * 5cm}{-F_f * d} = \frac{-K/4}{- K}$

$\frac{5cm}{d} = \frac{1}{4}$

$d = 20 cm$

so it will further move by 15 cm before coming to rest

Answer 2

Explanation:

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