Question

If a bullet of mass 5g moving with velocity of 150m/s hit a person's head in 0.03sec and get stuck in the head.Doctor's are trying to remove it.Find how much deep doctor need to penetrate the head to remove the bullet.​

Answer 1

Answer:

distance = 450 centimeters

= 450 cm

Explanation:

Answer 2

If a bullet of mass 5g moving with velocity of 150m/s hit a person's head in 0.03sec and get stuck in the head.Doctor's are trying to remove it.Find how much deep doctor need to penetrate the head to remove the bullet.

Solution :

Mass of bullet = 5 g

= 5 × 10-³ kg

Force = Change in momentum / time

= 0 - mv / 0.03

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Now ,

Force = -25 B

m × a = -25 N

a = -255 / 5 × 10-³

= -5 × 10³

s = ut . 1/2 at²

s = 4.5 - 4.5 / 2

s = 4.5 -2.25 = 2.25 m

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So, doctor need to penetrate the head by 2.25 m .