Question

A bullet moving with a speed of 200 m/s penetrates a wooden block. It travels a distance of 50 cm in the wooden block. What is the retardation offered by the wooden block?​

Answer 1

Explanation:

Correct option is

C

244.9cm/s

v

2

−u

2

=2as

0−(200)

2

=2a×4

⇒a=5000cm/s

2

Now initial velocity to travel 6 cm,

0−u

2

=−2×5000×6

⇒u=244.9cm/s