# Thread: Kinematics - Ball drop problem!

1. A 10 kg ball is dropped from a 30 m high building. When the ball has traveled 15 m, at what rate is it accelerating?

2.

3. We don't do homework here...

Please see the Homewok topic for guidelines.

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4. at -G

5. Well that's a useless, meaningless reply...

6. Originally Posted by shivanshu3
A 10 kg ball is dropped from a 30 m high building. When the ball has traveled 15 m, at what rate is it accelerating?
If you neglect air resistance, the acceleration is constant. As someone has already answered, it is -g, where g is the acceleration due to earth's gravity = 32ft/sec^2 or 980 cm/sec^2.

7. No the acceleration is g, the sign is irrelevant here, and you should also read the homework link I included above...

"If you are considering to use the forum to support your homework efforts, first honestly try yourself by researching scientific references like textbooks or trusted information gathered with the internet. Try to combine all information you have.

If you still seem to be stuck and you want to ask the forum members, expect support in finding the answers yourself rather than solving the entire problems. A good hint can be valuable. Carefully describe, what you have already tried to get to a result so that replies can be as specific to your problem as possible.

For those kind individuals, who want to answer homework questions, please support those rules and do not answer the questions prematurely. Rather consider helping

8. Originally Posted by MeteorWayne
We don't do homework here...

Please see the Homewok topic for guidelines.

Rules on homework help - READ THIS BEFORE POSTING OR HELPING

At least make an effort first.
This is not my homework. This was a tricky question, so I just wanted to see how many of you guys actually get the answer.

9. Originally Posted by MeteorWayne
No the acceleration is g, the sign is irrelevant here, and you should also read the homework link I included above...

"If you are considering to use the forum to support your homework efforts, first honestly try yourself by researching scientific references like textbooks or trusted information gathered with the internet. Try to combine all information you have.

If you still seem to be stuck and you want to ask the forum members, expect support in finding the answers yourself rather than solving the entire problems. A good hint can be valuable. Carefully describe, what you have already tried to get to a result so that replies can be as specific to your problem as possible.

For those kind individuals, who want to answer homework questions, please support those rules and do not answer the questions prematurely. Rather consider helping
Small quibble - acceleration is a vector quantity, so whether the sign is + or - depends on which direction you call +. I assume + means up.

10. It saddens me to hear that this is a tricky question.

11. yeah people only hang around here to expose crazy ideas or bully those who propose crazy ideas in groups like hienas

an inocent guy here looks odd by all means

12. Originally Posted by MeteorWayne
Well that's a useless, meaningless reply...
oh meteor wayne dont you watch sesame street you have to be polite and also realize the irony of your post

repeat after me

p o l i t e

13. No comment

14. Originally Posted by TheObserver
It saddens me to hear that this is a tricky question.
haha nerd!

15. Originally Posted by shivanshu3
Originally Posted by TheObserver
It saddens me to hear that this is a tricky question.
haha nerd!
That gravity is constant near to earth surface is one of the very first things we learned back in high school!