Question

the bullet of mass 20 gram is moving which speech of 240 meter per second. after stracking a tree is velocity becomes 50 metre per second. find the work done by tree.​

Answer 1

$m = 20g =0.02$

$u=240 \: m/s$

$v=50 \: m/s$

$w = \frac{1}{2} m {v}^{2} - \frac{1}{2}m {v}^{2} \\ = \frac{1}{2} m( {v}^{2} - {u}^{2} )$

$w = \frac{1}{2} ( 0.02)( {50}^{2} - {240}^{2} )$

$w = \frac{1}{2} (0.02)(2,500 - 57,600)$

$w\frac{1}{2} = 0.02(55100)$

$w = \frac{1}{2} (1,102)$

$w = 551$

$j = 551$

Answer 2

Answer:

w = 1/2 × (1,102).

w = 551w = 551.

j = 551j = 551.

$thanks$