Question

help me solving this question

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Answer 1

Answer:

distance penetrated = 7.5 m, average retardation force = 7.5 N

Explanation:

Given that,

Mass of the bullet is 0.005 Kg.

Initial velocity of the bullet is 150 m/s.

Time of penetration is 1/10 sec.

Final velocity of the bullet is 0 m/s.

So,

distance of penetration = ut + 1/2at^2

s = 150(1/10) + 1/2[(0-150)/1/10](1/10)^2

s = 7.5 m

average retardation force = mass * acceleration of retardation

                                      F = m*a

                                         = 0.005*(0-150)/(1/10)

                                         = 7.5 N

HOPE THE ANSWER HELPED.