Question

a wooden block reduces the velocity of a bullet to 50% after pentrating .9 m inside the block then the total distance travel before it come to rest​

Answer 1

Answer:

answer

Explanation:

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Answer 2

Answer:

3

40

cm

Let initial velocity =V

When bullet pennetrates 0.4m=

2

V

& let dist =x (when V

final

=0)

Applying, eq. of kinematic motion

4

V

2

=V

2

−2a(0.4) {a is de-acc a→(−)ve)

a=

4×0.8

3V

2

⟶(i)

Now, 0=

4

V

2

−2a(x)

2ax=

4

V

2

⟶(ii)

Putting (i) in (ii)

4×0.8

3V

2

a

=

8x

V

2

⇒x=

3

0.4m

x=

3

40

cm