what is the velocity of a ball right before it hits the ground if it falls from a 2.5 m bookshelf?

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what is the velocity of a ball right before it hits the ground if it falls from a 2.5 m bookshelf?

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Answer:vf = 7 m/s

Explanation:The final velocity of the ball right before it hits the ground can be found by using the third equation of motion:

where,

g = acceleration due to gravity = 9.81 m/s²

h = height = 2.5 m

vf = final velocity = ?

vi = initial velocity = 0 m/s

Therefore,

vf = 7 m/s