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A bullet going with speed 350 m/s enters...

A bullet going with speed 350 m/s enters in a concrete wall and penetrates a distance of 5 cm before coming to rest . Find the deceleration ?

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The correct Answer is:
A, B
`u= 350 m/s
S=5cm=0.05m
v=0
Decelaratiion
a= (v^2-u^2)/(2s)
=(0-(350)^2)/(2xx0.05)
=-12.2xx10^5m/s^2
Deceleration is 12.2xx10^5m/s^2`
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HC VERMA-REST AND MOTION : KINEMATICS-Exercises
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  14. A ball is dropped from a height. If it takes 0.2s to cross the last 6m...

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  15. A ball is dropped from a height of 5 m onto a sandy floor and penetrat...

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  16. An elevator is descending with uniform acceleration.To measure the acc...

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  17. A 10 kg ball is dropped from a height of 10m. Find (a) the initial po...

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  18. A ball is thrown at a speed of 40 m/s at an angle of 60^0 with the hor...

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  19. A ball whose Kinetic Energy is E is projected at an angle of 45^(@) to...

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