Arrow is fired horizontally at a speed of .

Arrow is fired horizontally at a speed of .

Arrow is fired horizontally at a height of  from ground.

Find the final velocity of the arrow when it will hit the ground.

Newton thid law of motion: .

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Final velocity of the arrow when it hits the ground is .

Where as for projectile, here need to consider the velocity of vertical component.

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Therefore here, , .

Substitute corresponding values in the expression.

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Therefore, arrow travels 4 seconds in the air.

Newton first law of motion: .

Where is final velocity and is initial velocity.

Here .

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Final velocity of the arrow when it hits the ground is .