Question

when a bullet having
Velocity 200 m/s penetrates a l'm thick
wooden block, its velocity decreases
to 100 m/s calculate the retardation
of the bullet.
​

Answer 1

Explanation:

PHYSICS

The velocity of a bullet is reduced from 200 ms−1 to 100 ms−1 while travelling through a wooden plank of thickness 10 cm. The retardation, assuming it to be uniform, will be

A

10×104ms−2

B

12×104ms−2

C

13.5×104ms−2

D

15×104ms−2

Share

Study later

ANSWER

Given that.

initial velocity, u=200m/s

final velocity, v=100m/s

distance travelled, s=10cm =0.1m

We know that,

u2−v2=2as

or,a=2su2−v2=2(0.1)(200)2−(100)2=0.2300

=1.5×106m/s2

=15×104m/s