Question

A cricket ball is dropped from a height of 20metres. Calculate the speed of the ball when it hits the ground.
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give me correct answer​

Answer 1

Answer:

Thus the ball takes 2 second to fall through a height of 20 metres .

Answer 2

Solution -

We have,

• Initial speed (u) = 0
• Acceleration due to gravity (g) = 10m/s²
• Height (h) = 20m

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We have to calculate the final speed of the ball. We know that for a freely falling body,

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⠀⠀⠀ ⠀⠀★ v² = u² + 2gh

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Putting all the values

➝ v² = (0)² + 2 × 10 × 20

➝ v² = 0 + 20 × 20

➝ v² = 400

➝ v = √400

➝ v = 20 m/s

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Thus, the speed of cricket ball when it hits the ground will be 20 metres per second.