A bullet is fired through a board, 14.0 cm thick, with its line of motion perpendicular to the face of the board. If it enters with a speed of 450 m/s and emerges with a speed of 220 m/s, what is the bullet's acceleration as it passes through the board, in units of km/s2 , assuming constant acceleration?

Explanation:

Given :

Thickness of board ,

Initial speed of bullet ,

Final speed of bullet ,

We know by equation of motion.

 ( all sign have their usual meaning )

Putting all given values we get :

Hence, this is the required solution.

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explanation:

wind is defined by the direction it blows from.   for example, a wind blowing from north to south is called a northerly wind.

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