3 ms·
> A ball is thrown off a building at a speed of 15m/s and at 30 degrees to the horizontal. If the building is 100m tall, how far from the base of the building w
by jordigh 8y ago
> A ball is thrown off a building at a speed of 15m/s and at 30 degrees to the horizontal. If the building is 100m tall, how far from the base of the building will the ball land? g=9.8m/s²
280.17 metres, right?
- deleted 8y ago[deleted]
- Koshkin 8y agoDepends on whether the angle is above or below the horizontal. (The ball won't make it this far regardless.)
- noobermin 8y agoThat's a good point. I'm not one for details and I just assumed it above the horizontal because it makes it a touch more interesting.
- abdullahkhalids 8y agoNope. That's too far. I am too lazy to write out the equations, so we can use an app such as this http://www.walter-fendt.de/html5/phen/projectile_en.htm http://www.walter-fendt.de/html5/phen/projectile_en.htm to find out that it falls 69.5 m from the base of the building.
- jordigh 8y agoIt's not so difficult to fix. -(9.8/2) t^2 + 7.5 t + 100 = 0 Positive root is 5.3472 seconds, multiply that by 15*sqrt(3)/2 to get 69.462