A coin released at rest from the top of a tower hits the ground after falling 1.5 s. What is the speed of the coin as it hits the ground?

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Question:

A coin released at rest from the top of a tower hits the ground after falling 1.5 s. What is the speed of the coin as it hits the ground?

Answer:

The speed of coin as it hits the ground is 14.7 m/s.

Given data:

Initial speed of coin is, ?f=u%3D0%20%5C%3B%5Crm%20m%2Fs.

Time taken to fall on ground is, ?f=t%20%3D%201.

Use first kinematic equation of motion as,

?f=v%20%3D%20u%2Bgt

here, g is the gravitational acceleration.

Solving as,

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?f=v%20%3D%200%2B9.8%20%5Ctimes%201.5%5C%5Cv%3D%2014

Thus, the speed of coin as it hits the ground is 14.7 m/s.

Learn more about kinematic equation of motion here:

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