An iPhone is accidentally dropped from the top of Eureka Skydeck in Melbourne. The Skydeck is 297.3 m above the ground. How long does it take for the iPhone to hit the ground below?

To determine how long it takes for the iPhone to hit the ground after being dropped from the top of the Eureka Skydeck, we can use the equation of motion for free fall under gravity. The equation is:

\[
d = \frac{1}{2} g t^2
\]

Where:
- \(d = 297.3\) m (height from which the iPhone is dropped)
- \(g = 9.8\) m/s² (acceleration due to gravity)
- \(t\) is the time in seconds

We need to solve for \(t\):

\[
t = \sqrt{\frac{2d}{g}}
\]

Let me calculate the time \(t\) for you.The time it takes for the iPhone to hit the ground after being dropped from the Eureka Skydeck is approximately **7.79 seconds**.

Would you like further details on this calculation or have any questions? 

Here are 5 related questions that could expand on this topic:
1. How would the time change if the iPhone was thrown downward instead of being dropped?
2. What would be the final velocity of the iPhone just before it hits the ground?
3. How would air resistance affect the time it takes for the iPhone to hit the ground?
4. What would be the impact velocity if the Skydeck was twice as high?
5. How long would it take for the iPhone to hit the ground if dropped from a plane at 10,000 meters?

**Tip:** In free fall problems, always remember that the initial velocity is zero if the object is dropped (not thrown).

Discover how long it takes for an iPhone to hit the ground after being dropped from the Eureka Skydeck in Melbourne, 297.3 meters above ground. Use the equation of motion for free fall under gravity to calculate the time. Learn about gravity's acceleration and time calculation. Perfect for high school physics enthusiasts.

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