Question

A bullet moving with a velocity of 200 m per second penetrates a wooden block and comes to rest after travelling for centimetres inside it what velocity is needed for travelling distance of 9 cm in same block

Answer 1

Dear Student,

Given Velocity = 200 cm/sec

Initial velocity = 0

From the Netwon's third Law of equation

V^2- U^2 = 2as

40000 = 8 a

a = 5000 cm/sec^2

v^2 = 40000+ 90000

             V^2 = 130000

           V = 100√13 cm/sec

This would be the velocity.

Cheers!!

Regards,
AJay
(B.tech second year, IIT(BHU)VARANASI )