Question

A bullet fired into a fixed target loses half of it's velocity in penetrating 15cm.How much further it will penetrate before coming to test?
If you answered this I will mark as brilliant ​

Answer 1

Answer:

Applying the Equation of motion for the initial velocity of the bullet

v

2

=u

2

+2aS

a=−

40

u

2

Applying the equation of motion for the bullet after penetrating 15cm

v

2

=u

2

+2aS

Here, u=0 where the bullet is at the rest

The initial velocity of the bullet after penetrating 15cm is

2

u

Applying the data in the equation of motion

We get

v

2

=u

2

+2aS

⇒

20

u

2

S=

4

u

2

⇒S=5cm