(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Jim's friend climbs up a 25m tower and lets an apple fall straight down. Jim is standing 10 m away from tower and will shoot the apple just as teh apple is at a height of 1.5m, the same heightfrom which the gun was fired. The bullet has an initial speed of 40 m/s. How much time after friend lets go of apple does Jim need to fire the gun?

2. Relevant equations

3. The attempt at a solution

I calculated the time it took for the bullet to get from inital position to position where it's supposed to meet the apple-40m/s divided by 10m since apple and gun are at the same height...I think that's right...so, I got 4 seconds.

But I'm stuck on how to calculate the time it took for the apple to go from 20m to 1.5 m. The distance the apple will have to go would obviously be 18.5m and because it's falling straight down, wouldn't that mean a=-9.8 m/s^2?

Thanks in advance!

I may be posting like 3 more questions! :/

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# Homework Help: How much time after his friend lets go of the apple does Jim need to fire the gun?

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