Recent content by Jirya

But why is the ball moving up then? If only gravity works alone you could imagine that the ball should move downwards?

Yeah, it's in vacuum. My mistake. I should have informed that. ... What are you implying? :-D

I don't see how that's relevant here? :)

Of course, the gravitation force and a force from the 'table'. The force from the table is greater; and that means that the ball jumps up. But actually, I'm just interested to know which forces are acting between A and B. A friend of my claim that only the gravitation force is acting. Is that true?

Homework Statement I have attached a picture. I just want to know which forces affect the ball at different times: A, B, C and D. Could someone please sum it up really fast? : -) Homework Equations The Attempt at a Solution

Oh, the "-" was not written on purpose. But thank you for the heads up! :) Have a great day.

Just to make sure. How long does it take the package to drop down the chimney? - Around 7 seconds. Your task now is to help Santa to determine where he will let go of the package, so that it hits its target. - 2333.333 meters before the chimney. Can one of you confirm that these results are...

Thank you. Hey, It made me think about something. I guess, you would miss, because the object will fall with a parabolic trajectory in the same direction the plane is flying. But .. Doesn't the object have the same speed as Santa Claus? in this case 1200 km/hour? So now I have...

Homework Statement I have been given a small task. There is two parts. (I have translated it from another language): "Santa is flying in his sleigh 836,6 feet (250 meters) above the ground. To save time, he will let the packets fall from the sack down the chimney of a house. The package is...